Chemistry Nomenclature

Front 1

H

Back 1

Hydrogen
Atomic #1
Atomic weight: 1.00794 (7) [see notes g m r]
Standard state: gas at 298 K
Group in periodic table: 1
Group name: (none)
Period in periodic table: 1
Block in periodic table: s-block
Colour: colourless
Classification: Non-metallic

Front 2

He

Back 2

Name: Helium
Symbol: He
Atomic number: 2
Atomic weight: 4.002602 (2) [see notes g r]
Standard state: gas at 298 K
CAS Registry ID: 7440-59-7
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 1
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 3

Li

Back 3

Name: Lithium
Symbol: Li
Atomic number: 3
Atomic weight: [ 6.941 (2)] [see notes g m r]
Standard state: solid at 298 K
CAS Registry ID: 7439-93-2
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 2
Block in periodic table: s-block
Colour: silvery white/grey
Classification: Metallic

Front 4

Be

Back 4

Name: Beryllium
Symbol: Be
Atomic number: 4
Atomic weight: 9.012182 (3)
Standard state: solid at 298 K
CAS Registry ID: 7440-41-7
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 2
Block in periodic table: s-block
Colour: lead grey
Classification: Metallic

Front 5

B

Back 5

Name: Boron
Symbol: B
Atomic number: 5
Atomic weight: 10.811 (7) [see notes g m r]
Standard state: solid at 298 K
CAS Registry ID: 7440-42-8
Group in periodic table: 13
Group name: (none)
Period in periodic table: 2
Block in periodic table: p-block
Colour: black
Classification: Semi-metallic

Front 6

C

Back 6

Name: Carbon
Symbol: C
Atomic number: 6
Atomic weight: 12.0107 (8) [see notes g r]
Standard state: solid at 298 K
CAS Registry ID: 7440-44-0
Group in periodic table: 14
Group name: (none)
Period in periodic table: 2
Block in periodic table: p-block
Colour: graphite is black, diamond is colourless
Classification: Non-metallic

Front 7

N

Back 7

Name: Nitrogen
Symbol: N
Atomic number: 7
Atomic weight: 14.0067 (2) [see notes g r]
Standard state: gas at 298 K
CAS Registry ID: 7727-37-9
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 2
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 8

O

Back 8

Name: Oxygen
Symbol: O
Atomic number: 8
Atomic weight: 15.9994 (3) [see notes g r]
Standard state: gas at 298 K
CAS Registry ID: 7782-44-7
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 2
Block in periodic table: p-block
Colour: colourless as a gas, liquid is pale blue
Classification: Non-metallic

Front 9

F

Back 9

Name: Fluorine
Symbol: F
Atomic number: 9
Atomic weight: 18.9984032 (5)
Standard state: gas at 298 K
CAS Registry ID: 7782-41-4
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 2
Block in periodic table: p-block
Colour: pale yellow
Classification: Non-metallic

Front 10

Ne

Back 10

Name: Neon
Symbol: Ne
Atomic number: 10
Atomic weight: 20.1797 (6) [see notes g m]
Standard state: gas at 298 K
CAS Registry ID: 7440-01-9
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 2
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 11

Na

Back 11

Name: Sodium
Symbol: Na
Atomic number: 11
Atomic weight: 22.98976928 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-23-5
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 3
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 12

Mg

Back 12

Name: Magnesium
Symbol: Mg
Atomic number: 12
Atomic weight: 24.3050 (6)
Standard state: solid at 298 K
CAS Registry ID: 7439-95-4
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 3
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 13

Al

Back 13

Name: Aluminium
Symbol: Al
Atomic number: 13
Atomic weight: 26.9815386 (8)
Standard state: solid at 298 K
CAS Registry ID: 7429-90-5
Group in periodic table: 13
Group name: (none)
Period in periodic table: 3
Block in periodic table: p-block
Colour: silvery
Classification: Metallic

Front 14

Si

Back 14

Name: Silicon
Symbol: Si
Atomic number: 14
Atomic weight: 28.0855 (3) [see note r]
Standard state: solid at 298 K
CAS Registry ID: 7440-21-3
Group in periodic table: 14
Group name: (none)
Period in periodic table: 3
Block in periodic table: p-block
Colour: dark grey with a bluish tinge
Classification: Semi-metallic

Front 15

P

Back 15

Name: Phosphorus
Symbol: P
Atomic number: 15
Atomic weight: 30.973762 (2)
Standard state: solid at 298 K
CAS Registry ID: 7723-14-0
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 3
Block in periodic table: p-block
Colour: colourless/red/silvery white
Classification: Non-metallic

Front 16

S

Back 16

Name: Sulfur
Symbol: S
Atomic number: 16
Atomic weight: 32.065 (5) [see notes g r]
Standard state: solid at 298 K
CAS Registry ID: 7704-34-9
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 3
Block in periodic table: p-block
Colour: lemon yellow
Classification: Non-metallic

Front 17

Cl

Back 17

Name: Chlorine
Symbol: Cl
Atomic number: 17
Atomic weight: 35.453 (2) [see notes g m]
Standard state: gas at 298 K
CAS Registry ID: 7782-50-5
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 3
Block in periodic table: p-block
Colour: yellowish green
Classification: Non-metallic

Front 18

Ar

Back 18

Name: Argon
Symbol: Ar
Atomic number: 18
Atomic weight: 39.948 (1) [see notes g r]
Standard state: gas at 298 K
CAS Registry ID: 7440-37-1
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 3
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 19

K

Back 19

Name: Potassium
Symbol: K
Atomic number: 19
Atomic weight: 39.0983 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-09-7
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 4
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 20

Ca

Back 20

Name: Calcium
Symbol: Ca
Atomic number: 20
Atomic weight: 40.078 (4) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-70-2
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 4
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 21

Sc

Back 21

Name: Scandium
Symbol: Sc
Atomic number: 21
Atomic weight: 44.955912 (6)
Standard state: solid at 298 K
CAS Registry ID: 7440-20-2
Group in periodic table: 3
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 22

Ti

Back 22

Name: Titanium
Symbol: Ti
Atomic number: 22
Atomic weight: 47.867 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-32-6
Group in periodic table: 4
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: silvery metallic
Classification: Metallic

Front 23

V

Back 23

Name: Vanadium
Symbol: V
Atomic number: 23
Atomic weight: 50.9415 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-62-2
Group in periodic table: 5
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: silvery grey metallic
Classification: Metallic

Front 24

Cr

Back 24

Name: Chromium
Symbol: Cr
Atomic number: 24
Atomic weight: 51.9961 (6)
Standard state: solid at 298 K
CAS Registry ID: 7440-47-3
Group in periodic table: 6
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: silvery metallic
Classification: Metallic

Front 25

Mn

Back 25

Name: Manganese
Symbol: Mn
Atomic number: 25
Atomic weight: 54.938045 (5)
Standard state: solid at 298 K
CAS Registry ID: 7439-96-5
Group in periodic table: 7
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: silvery metallic
Classification: Metallic

Front 26

Fe

Back 26

Name: Iron
Symbol: Fe
Atomic number: 26
Atomic weight: 55.845 (2)
Standard state: solid at 298 K
CAS Registry ID: 7439-89-6
Group in periodic table: 8
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: lustrous, metallic, greyish tinge
Classification: Metallic

Front 27

Co

Back 27

Name: Cobalt
Symbol: Co
Atomic number: 27
Atomic weight: 58.933195 (5)
Standard state: solid at 298 K
CAS Registry ID: 7440-48-4
Group in periodic table: 9
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: lustrous, metallic, greyish tinge
Classification: Metallic

Front 28

Ni

Back 28

Name: Nickel
Symbol: Ni
Atomic number: 28
Atomic weight: 58.6934 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-02-0
Group in periodic table: 10
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: lustrous, metallic, silvery tinge
Classification: Metallic

Front 29

Cu

Back 29

Name: Copper
Symbol: Cu
Atomic number: 29
Atomic weight: 63.546 (3) [see note r]
Standard state: solid at 298 K
CAS Registry ID: 7440-50-8
Group in periodic table: 11
Group name: Coinage metal
Period in periodic table: 4
Block in periodic table: d-block
Colour: copper, metallic
Classification: Metallic

Front 30

Zn

Back 30

Name: Zinc
Symbol: Zn
Atomic number: 30
Atomic weight: 65.409 (4) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-66-6
Group in periodic table: 12
Group name: (none)
Period in periodic table: 4
Block in periodic table: d-block
Colour: bluish pale grey
Classification: Metallic

Front 31

Ga

Back 31

Name: Gallium
Symbol: Ga
Atomic number: 31
Atomic weight: 69.723 (1)
Standard state: solid at 298 K (but melts only slightly above this temperature)
CAS Registry ID: 7440-55-3
Group in periodic table: 13
Group name: (none)
Period in periodic table: 4
Block in periodic table: p-block
Colour: silvery white
Classification: Metallic

Front 32

Ge

Back 32

Name: Germanium
Symbol: Ge
Atomic number: 32
Atomic weight: 72.64 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-56-4
Group in periodic table: 14
Group name: (none)
Period in periodic table: 4
Block in periodic table: p-block
Colour: greyish white
Classification: Semi-metallic

Front 33

As

Back 33

Name: Arsenic
Symbol: As
Atomic number: 33
Atomic weight: 74.92160 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-38-2
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 4
Block in periodic table: p-block
Colour: metallic grey
Classification: Semi-metallic

Front 34

Se

Back 34

Name: Selenium
Symbol: Se
Atomic number: 34
Atomic weight: 78.96 (3)
Standard state: solid at 298 K
CAS Registry ID: 7782-49-2
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 4
Block in periodic table: p-block
Colour: grey, metallic lustre
Classification: Non-metallic

Front 35

Br

Back 35

Name: Bromine
Symbol: Br
Atomic number: 35
Atomic weight: 79.904 (1)
Standard state: liquid at 298 K
CAS Registry ID: 7726-95-6
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 4
Block in periodic table: p-block
Colour: red-brown, metallic lustre when solid
Classification: Non-metallic

Front 36

Kr

Back 36

Name: Krypton
Symbol: Kr
Atomic number: 36
Atomic weight: 83.798 (2) [see notes g m]
Standard state: gas at 298 K
CAS Registry ID: 7439-90-9
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 4
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 37

Rb

Back 37

Name: Rubidium
Symbol: Rb
Atomic number: 37
Atomic weight: 85.4678 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-17-7
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 5
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 38

Sr

Back 38

Name: Strontium
Symbol: Sr
Atomic number: 38
Atomic weight: 87.62 (1) [see notes g r]
Standard state: solid at 298 K
CAS Registry ID: 7440-24-6
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 5
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 39

Y

Back 39

Name: Yttrium
Symbol: Y
Atomic number: 39
Atomic weight: 88.90585 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-65-5
Group in periodic table: 3
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 40

Zr

Back 40

Name: Zirconium
Symbol: Zr
Atomic number: 40
Atomic weight: 91.224 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-67-7
Group in periodic table: 4
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 41

Nb

Back 41

Name: Niobium
Symbol: Nb
Atomic number: 41
Atomic weight: 92.90638 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-03-1
Group in periodic table: 5
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: grey metallic
Classification: Metallic

Front 42

Mo

Back 42

Name: Molybdenum
Symbol: Mo
Atomic number: 42
Atomic weight: 95.94 (2) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7439-98-7
Group in periodic table: 6
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: grey metallic
Classification: Metallic

Front 43

Tc

Back 43

Name: Technetium
Symbol: Tc
Atomic number: 43
Atomic weight: [ 98 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-26-8
Group in periodic table: 7
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery grey metallic
Classification: Metallic

Front 44

Ru

Back 44

Name: Ruthenium
Symbol: Ru
Atomic number: 44
Atomic weight: 101.07 (2) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-18-8
Group in periodic table: 8
Group name: Precious metal or Platinum group metal
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery white metallic
Classification: Metallic

Front 45

Rh

Back 45

Name: Rhodium
Symbol: Rh
Atomic number: 45
Atomic weight: 102.90550 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-16-6
Group in periodic table: 9
Group name: Precious metal or Platinum group metal
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery white metallic
Classification: Metallic

Front 46

Pd

Back 46

Name: Palladium
Symbol: Pd
Atomic number: 46
Atomic weight: 106.42 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-05-3
Group in periodic table: 10
Group name: Precious metal or Platinum group metal
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery white metallic
Classification: Metallic

Front 47

Ag

Back 47

Name: Silver
Symbol: Ag
Atomic number: 47
Atomic weight: 107.8682 (2) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-22-4
Group in periodic table: 11
Group name: Coinage metal
Period in periodic table: 5
Block in periodic table: d-block
Colour: silver
Classification: Metallic

Front 48

Cd

Back 48

Name: Cadmium
Symbol: Cd
Atomic number: 48
Atomic weight: 112.411 (8) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-43-9
Group in periodic table: 12
Group name: (none)
Period in periodic table: 5
Block in periodic table: d-block
Colour: silvery grey metallic
Classification: Metallic

Front 49

In

Back 49

Name: Indium
Symbol: In
Atomic number: 49
Atomic weight: 114.818 (3)
Standard state: solid at 298 K
CAS Registry ID: 7440-74-6
Group in periodic table: 13
Group name: (none)
Period in periodic table: 5
Block in periodic table: p-block
Colour: silvery lustrous grey
Classification: Metallic

Front 50

Sn

Back 50

Name: Tin
Symbol: Sn
Atomic number: 50
Atomic weight: 118.710 (7) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-31-5
Group in periodic table: 14
Group name: (none)
Period in periodic table: 5
Block in periodic table: p-block
Colour: silvery lustrous grey
Classification: Metallic

Front 51

Sb

Back 51

Name: Antimony
Symbol: Sb
Atomic number: 51
Atomic weight: 121.760 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-36-0
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 5
Block in periodic table: p-block
Colour: silvery lustrous grey
Classification: Semi-metallic

Front 52

Te

Back 52

Name: Tellurium
Symbol: Te
Atomic number: 52
Atomic weight: 127.60 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 13494-80-9
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 5
Block in periodic table: p-block
Colour: silvery lustrous grey
Classification: Semi-metallic

Front 53

I

Back 53

Name: Iodine
Symbol: I
Atomic number: 53
Atomic weight: 126.90447 (3)
Standard state: solid at 298 K
CAS Registry ID: 7553-56-2
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 5
Block in periodic table: p-block
Colour: violet-dark grey, lustrous
Classification: Non-metallic

Front 54

Xe

Back 54

Name: Xenon
Symbol: Xe
Atomic number: 54
Atomic weight: 131.293 (6) [see note g
Standard state: gas at 298 K
CAS Registry ID: 7440-63-3
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 5
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 55

Cs

Back 55

Name: Caesium
Symbol: Cs
Atomic number: 55
Atomic weight: 132.9054519 (2)
Standard state: solid at 298 K (but melts only slightly above this temperature)
CAS Registry ID: 7440-46-2
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 6
Block in periodic table: s-block
Colour: silvery gold
Classification: Metallic

Front 56

Ba

Back 56

Name: Barium
Symbol: Ba
Atomic number: 56
Atomic weight: 137.327 (7)
Standard state: solid at 298 K
CAS Registry ID: 7440-39-3
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 6
Block in periodic table: s-block
Colour: silvery white
Classification: Metallic

Front 57

La

Back 57

Name: Lanthanum
Symbol: La
Atomic number: 57
Atomic weight: 138.90547 (7) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7439-91-0
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 58

Ce

Back 58

Name: Cerium
Symbol: Ce
Atomic number: 58
Atomic weight: 140.116 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-45-1
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 59

Pr

Back 59

Name: Praseodymium
Symbol: Pr
Atomic number: 59
Atomic weight: 140.90765 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-10-0
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white, yellowish tinge
Classification: Metallic

Front 60

Nd

Back 60

Name: Neodymium
Symbol: Nd
Atomic number: 60
Atomic weight: 144.242 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-00-8
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white, yellowish tinge
Classification: Metallic

Front 61

Pm

Back 61

Name: Promethium
Symbol: Pm
Atomic number: 61
Atomic weight: [ 145 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-12-2
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: metallic
Classification: Metallic

Front 62

Sm

Back 62

Name: Samarium
Symbol: Sm
Atomic number: 62
Atomic weight: 150.36 (2) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-19-9
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 63

Eu

Back 63

Name: Europium
Symbol: Eu
Atomic number: 63
Atomic weight: 151.964 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-53-1
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 64

Gd

Back 64

Name: Gadolinium
Symbol: Gd
Atomic number: 64
Atomic weight: 157.25 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-54-2
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 65

Tb

Back 65

Name: Terbium
Symbol: Tb
Atomic number: 65
Atomic weight: 158.92535 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-27-9
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 66

Dy

Back 66

Name: Dysprosium
Symbol: Dy
Atomic number: 66
Atomic weight: 162.500 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7429-91-6
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 67

Ho

Back 67

Name: Holmium
Symbol: Ho
Atomic number: 67
Atomic weight: 164.93032 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-60-0
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 68

Er

Back 68

Name: Erbium
Symbol: Er
Atomic number: 68
Atomic weight: 167.259 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-52-0
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 69

Tm

Back 69

Name: Thulium
Symbol: Tm
Atomic number: 69
Atomic weight: 168.93421 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-30-4
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 70

Yb

Back 70

Name: Ytterbium
Symbol: Yb
Atomic number: 70
Atomic weight: 173.04 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-64-4
Group in periodic table:
Group name: Lanthanoid
Period in periodic table: 6 (lanthanoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 71

Lu

Back 71

Name: Lutetium
Symbol: Lu
Atomic number: 71
Atomic weight: 174.967 (1) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7439-94-3
Group in periodic table: 3
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 72

Hf

Back 72

Name: Hafnium
Symbol: Hf
Atomic number: 72
Atomic weight: 178.49 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-58-6
Group in periodic table: 4
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: grey steel
Classification: Metallic

Front 73

Ta

Back 73

Name: Tantalum
Symbol: Ta
Atomic number: 73
Atomic weight: 180.94788 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-25-7
Group in periodic table: 5
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: grey blue
Classification: Metallic

Front 74

W

Back 74

Name: Tungsten
Symbol: W
Atomic number: 74
Atomic weight: 183.84 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-33-7
Group in periodic table: 6
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: greyish white, lustrous
Classification: Metallic

Front 75

R

Back 75

Name: Rhenium
Symbol: Re
Atomic number: 75
Atomic weight: 186.207 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-15-5
Group in periodic table: 7
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: greyish white
Classification: Metallic

Front 76

Os

Back 76

Name: Osmium
Symbol: Os
Atomic number: 76
Atomic weight: 190.23 (3) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-04-2
Group in periodic table: 8
Group name: Precious metal or Platinum group metal
Period in periodic table: 6
Block in periodic table: d-block
Colour: bluish grey
Classification: Metallic

Front 77

Ir

Back 77

Name: Iridium
Symbol: Ir
Atomic number: 77
Atomic weight: 192.217 (3)
Standard state: solid at 298 K
CAS Registry ID: 7439-88-5
Group in periodic table: 9
Group name: Precious metal or Platinum group metal
Period in periodic table: 6
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 78

Pt

Back 78

Name: Platinum
Symbol: Pt
Atomic number: 78
Atomic weight: 195.084 (9)
Standard state: solid at 298 K
CAS Registry ID: 7440-06-4
Group in periodic table: 10
Group name: Precious metal or platinum group metal
Period in periodic table: 6
Block in periodic table: d-block
Colour: greyish white
Classification: Metallic

Front 79

Au

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Name: Gold
Symbol: Au
Atomic number: 79
Atomic weight: 196.966569 (4)
Standard state: solid at 298 K
CAS Registry ID: 7440-57-5
Group in periodic table: 11
Group name: Coinage metal
Period in periodic table: 6
Block in periodic table: d-block
Colour: gold
Classification: Metallic

Front 80

Hg

Back 80

Name: Mercury
Symbol: Hg
Atomic number: 80
Atomic weight: 200.59 (2)
Standard state: liquid at 298 K (the heaviest known elemental liquid)
CAS Registry ID: 7439-97-6
Group in periodic table: 12
Group name: (none)
Period in periodic table: 6
Block in periodic table: d-block
Colour: silvery white
Classification: Metallic

Front 81

Tl

Back 81

Name: Thallium
Symbol: Tl
Atomic number: 81
Atomic weight: 204.3833 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-28-0
Group in periodic table: 13
Group name: (none)
Period in periodic table: 6
Block in periodic table: p-block
Colour: silvery white
Classification: Metallic

Front 82

Pb

Back 82

Name: Lead
Symbol: Pb
Atomic number: 82
Atomic weight: 207.2 (1) [see notes g m]
Standard state: solid at 298 K
CAS Registry ID: 7439-92-1
Group in periodic table: 14
Group name: (none)
Period in periodic table: 6
Block in periodic table: p-block
Colour: bluish white
Classification: Metallic

Front 83

Bi

Back 83

Name: Bismuth
Symbol: Bi
Atomic number: 83
Atomic weight: 208.98040 (1)
Standard state: solid at 298 K
CAS Registry ID: 7440-69-9
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 6
Block in periodic table: p-block
Colour: lustrous reddish white
Classification: Metallic

Front 84

Po

Back 84

Name: Polonium
Symbol: Po
Atomic number: 84
Atomic weight: [ 209 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-08-6
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 6
Block in periodic table: p-block
Colour: silvery
Classification: Metallic

Front 85

At

Back 85

Name: Astatine
Symbol: At
Atomic number: 85
Atomic weight: [ 210 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-68-8
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 6
Block in periodic table: p-block
Colour: metallic
Classification: Semi-metallic

Front 86

Rn

Back 86

Name: Radon
Symbol: Rn
Atomic number: 86
Atomic weight: [ 222 ]
Standard state: gas at 298 K (the heaviest known mononuclear gas at 298 K)
CAS Registry ID: 10043-92-2
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 6
Block in periodic table: p-block
Colour: colourless
Classification: Non-metallic

Front 87

Fr

Back 87

Name: Francium
Symbol: Fr
Atomic number: 87
Atomic weight: [ 223 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-73-5
Group in periodic table: 1
Group name: Alkali metal
Period in periodic table: 7
Block in periodic table: s-block
Colour: metallic
Classification: Metallic

Front 88

Ra

Back 88

Name: Radium
Symbol: Ra
Atomic number: 88
Atomic weight: [ 226 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-14-4
Group in periodic table: 2
Group name: Alkaline earth metal
Period in periodic table: 7
Block in periodic table: s-block
Colour: metallic
Classification: Metallic

Front 89

Ac

Back 89

Name: Actinium
Symbol: Ac
Atomic number: 89
Atomic weight: [ 227 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-34-8
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery
Classification: Metallic

Front 90

Th

Back 90

Name: Thorium
Symbol: Th
Atomic number: 90
Atomic weight: 232.03806 (2) [see note g]
Standard state: solid at 298 K
CAS Registry ID: 7440-29-1
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 91

Pa

Back 91

Name: Protactinium
Symbol: Pa
Atomic number: 91
Atomic weight: 231.03588 (2)
Standard state: solid at 298 K
CAS Registry ID: 7440-13-3
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery metallic
Classification: Metallic

Front 92

U

Back 92

Name: Uranium
Symbol: U
Atomic number: 92
Atomic weight: 238.02891 (3) [see notes g m
Standard state: solid at 298 K
CAS Registry ID: 7440-61-1
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: metallic grey
Classification: Metallic

Front 93

Np

Back 93

Name: Neptunium
Symbol: Np
Atomic number: 93
Atomic weight: [ 237 ]
Standard state: solid at 298 K
CAS Registry ID: 7439-99-8
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery metallic
Classification: Metallic

Front 94

Pu

Back 94

Name: Plutonium
Symbol: Pu
Atomic number: 94
Atomic weight: [ 244 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-07-5
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 95

Am

Back 95

Name: Americium
Symbol: Am
Atomic number: 95
Atomic weight: [ 243 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-35-9
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silvery white
Classification: Metallic

Front 96

Cm

Back 96

Name: Curium
Symbol: Cm
Atomic number: 96
Atomic weight: [ 247 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-51-9
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: silver
Classification: Metallic

Front 97

Bk

Back 97

Name: Berkelium
Symbol: Bk
Atomic number: 97
Atomic weight: [ 247 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-40-6
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 98

Cf

Back 98

Name: Californium
Symbol: Cf
Atomic number: 98
Atomic weight: [ 251 ]
Standard state: solid at 298 K
CAS Registry ID: 7440-71-3
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 99

Es

Back 99

Name: Einsteinium
Symbol: Es
Atomic number: 99
Atomic weight: [ 252 ]
Standard state: solid at 298 K
CAS Registry ID: 7429-92-7
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 100

Fm

Back 100

Name: Fermium
Symbol: Fm
Atomic number: 100
Atomic weight: [ 257 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 7440-72-4
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 101

Md

Back 101

Name: Mendelevium
Symbol: Md
Atomic number: 101
Atomic weight: [ 258 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 7440-11-1
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 102

No

Back 102

Name: Nobelium
Symbol: No
Atomic number: 102
Atomic weight: [ 259 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 10028-14-5
Group in periodic table:
Group name: Actinoid
Period in periodic table: 7 (actinoid)
Block in periodic table: f-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 103

Lr

Back 103

Name: Lawrencium
Symbol: Lr
Atomic number: 103
Atomic weight: [ 262 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 22537-19-5
Group in periodic table: 3
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 104

Rf

Back 104

Name: Rutherfordium
Symbol: Rf
Atomic number: 104
Atomic weight: [ 267 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 53850-36-5
Group in periodic table: 4
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 105

Db

Back 105

Name: Dubnium
Symbol: Db
Atomic number: 105
Atomic weight: [ 268 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 53850-35-4
Group in periodic table: 5
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 106

Sg

Back 106

Name: Seaborgium
Symbol: Sg
Atomic number: 106
Atomic weight: [ 271 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54038-81-2
Group in periodic table: 6
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 107

Bh

Back 107

Name: Bohrium
Symbol: Bh
Atomic number: 107
Atomic weight: [ 272 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54037-14-8
Group in periodic table: 7
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 108

Hs

Back 108

Name: Hassium
Symbol: Hs
Atomic number: 108
Atomic weight: [ 270 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54037-57-9
Group in periodic table: 8
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 109

Mt

Back 109

Name: Meitnerium
Symbol: Mt
Atomic number: 109
Atomic weight: [ 276 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54038-01-6
Group in periodic table: 9
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

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Ds

Back 110

Name: Darmstadtium
Symbol: Ds
Atomic number: 110
Atomic weight: [ 281 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54083-77-1
Group in periodic table: 10
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 111

Rg

Back 111

Name: Roentgenium
Symbol: Rg
Atomic number: 111
Atomic weight: [ 280 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54386-24-2
Group in periodic table: 11
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 112

Uub

Back 112

Name: Ununbium
Symbol: Uub
Atomic number: 112
Atomic weight: [ 285 ]
Standard state: presumably a liquid at 298 K
CAS Registry ID: 54084-26-3
Group in periodic table: 12
Group name: (none)
Period in periodic table: 7
Block in periodic table: d-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 113

Uut

Back 113

Name: Ununtrium
Symbol: Uut
Atomic number: 113
Atomic weight: [ 284 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54084-70-7
Group in periodic table: 13
Group name: (none)
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 114

Uuq

Back 114

Name: Ununquadium
Symbol: Uuq
Atomic number: 114
Atomic weight: [ 289 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54085-16-4
Group in periodic table: 14
Group name: (none)
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 115

Uup

Back 115

Name: Ununpentium
Symbol: Uup
Atomic number: 115
Atomic weight: [ 288 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54085-64-2
Group in periodic table: 15
Group name: Pnictogen
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 116

Uuh

Back 116

Name: Ununhexium
Symbol: Uuh
Atomic number: 116
Atomic weight: [ 293 ]
Standard state: presumably a solid at 298 K
CAS Registry ID: 54100-71-9
Group in periodic table: 16
Group name: Chalcogen
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably metallic and silvery white or grey in appearance
Classification: Metallic

Front 117

Uus

Back 117

Name: Ununseptium
Symbol: Uus
Atomic number: 117
Atomic weight: [ ?]
Standard state: presumably a solid at 298 K
CAS Registry ID: 87658-56-8
Group in periodic table: 17
Group name: Halogen
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably metallic and dark in appearance
Classification: Unknown

Front 118

Uuo

Back 118

Name: Ununoctium
Symbol: Uuo
Atomic number: 118
Atomic weight: [ 294 ]
Standard state: presumably a gas at 298 K
CAS Registry ID: 54144-19-3
Group in periodic table: 18
Group name: Noble gas
Period in periodic table: 7
Block in periodic table: p-block
Colour: unknown, but probably a colourless gas
Classification: Non-metallic