Periodic Table Of Elements

Front 1

Hydrogen

Back 1

H

Front 2

Hydrogen

Back 2

Atomic Number: 1

Front 3

Hydrogen

Back 3

Atomic Mass: 1

Front 4

Hydrogen

Back 4

The lightest element, contains only a single proton, can lose or gain only 1 electron.

Front 5

Helium

Back 5

He

Front 6

Helium

Back 6

Atomic Number: 2

Front 7

Helium

Back 7

Atomic Mass: 4

Front 8

Helium

Back 8

The lightest noble gas, filled outer shell with only two electrons, named for the Greek word for sun because first discovered in spectral analysis of sunlight.

Front 9

Lithium

Back 9

Li

Front 10

Lithium

Back 10

Atomic Number: 3

Front 11

Lithium

Back 11

Atomic Mass: 7

Front 12

Lithium

Back 12

Active alkali metal from Group I with three protons, forms 1+ ions in a salt.

Front 13

Beryllium

Back 13

Be

Front 14

Beryllium

Back 14

Atomic Number: 4

Front 15

Beryllium

Back 15

Atomic Mass: 9

Front 16

Beryllium

Back 16

Alkaline earth metal with four protons used in forming strong lightweight alloys with copper.

Front 17

Boron

Back 17

B

Front 18

Boron

Back 18

Atomic Number: 5

Front 19

Boron

Back 19

Atomic Mass: 11

Front 20

Boron

Back 20

Metalloid in Group III combines with silicates to form heat resistant glassware, forms acid used ear drops and as a pesticide.

Front 21

Carbon

Back 21

C

Front 22

Carbon

Back 22

Atomic Number: 6

Front 23

Carbon

Back 23

Atomic Mass: 12

Front 24

Carbon

Back 24

Basis for all organic chemicals, essential for life as we know it on earth, element with four outer-shell electrons that undergo sp3 hybridization to form four bonding orbitals with tetrahedral structure.

Front 25

Silicon

Back 25

Si

Front 26

Silicon

Back 26

Atomic Number: 14

Front 27

Silicon

Back 27

Atomic Mass: 28

Front 28

Silicon

Back 28

The second most abundant element in the Earth's crust; a metalloid with four outer shell electrons used in solar cells, microprocessor chips, and ceramics.

Front 29

Germanium

Back 29

Ge

Front 30

Germanium

Back 30

Atomic Number: 32

Front 31

Germanium

Back 31

Atomic Mass: 73

Front 32

Germanium

Back 32

Group IV metalloid used in doping computer chips and transistors.

Front 33

Nitrogen

Back 33

N

Front 34

Nitrogen

Back 34

Atomic Number: 7

Front 35

Nitrogen

Back 35

Atomic Mass: 14

Front 36

Nitrogen

Back 36

Most abundant element in the Earth's atmosphere, an element that is relatively non-reactive at normal temperatures, essential for protein formation in living tissues.

Front 37

Phosphorus

Back 37

P

Front 38

Phosphorus

Back 38

Atomic Number: 15

Front 39

Phosphorus

Back 39

Atomic Mass: 31

Front 40

Phosphorus

Back 40

Group V element with three allotropes; white that reacts with air at 30 degrees C and red that is less active; element that is essential to strong root development in plants; element used in fertilizers, explosives, and detergents.

Front 41

Arsenic

Back 41

As

Front 42

Arsenic

Back 42

Atomic Number: 33

Front 43

Arsenic

Back 43

Atomic Mass: 75

Front 44

Arsenic

Back 44

Poisonous Group V metalloid used in making semiconductors and in pesticides.

Front 45

Oxygen

Back 45

O

Front 46

Oxygen

Back 46

Atomic Number: 8

Front 47

Oxygen

Back 47

Atomic Mass: 16

Front 48

Oxygen

Back 48

Most abundant element on Earth making up 48% of the Earths crust, atmosphere, and surface water; highly reactive element that supports combustion with many other substances; essential for respiration in most living organisms; ozone is a common allotrope; six outer shell electrons cause it to form 2- ions

Front 49

Sulfur

Back 49

S

Front 50

Sulfur

Back 50

Atomic Number: 16

Front 51

Sulfur

Back 51

Atomic Mass: 32

Front 52

Sulfur

Back 52

Common Group VI element with three different allotropic forms, widely used in industry as a component of sulfuric acid, used as a dehydrating agent in paints and plastics

Front 53

Selenium

Back 53

Se

Front 54

Selenium

Back 54

Atomic Number: 34

Front 55

Selenium

Back 55

Atomic Mass: 79

Front 56

Selenium

Back 56

Metalloid in Group VI used in making photocells

Front 57

Flourine

Back 57

F

Front 58

Flourine

Back 58

Atomic Number: 9

Front 59

Flourine

Back 59

Atomic Mass: 19

Front 60

Flourine

Back 60

Most reactive nonmetal that is never found free in nature. Member of Group VII, the halogen family; forms 1- ions; organic compounds containing this element are used as nonstick cookware and refrigerants; forms compounds used to prevent tooth decay

Front 61

Chlorine

Back 61

Cl

Front 62

Chlorine

Back 62

Atomic Number: 17

Front 63

Chlorine

Back 63

Atomic Mass: 35

Front 64

Bromine

Back 64

Br

Front 65

Bromine

Back 65

Atomic Number: 35

Front 66

Bromine

Back 66

Atomic Mass: 80

Front 67

Chlorine

Back 67

Halogen used as a bleaching agent, component of common table salt, used as a disnfectant and water purifier

Front 68

Bromine

Back 68

Halogen, which is a brownish liquid at room temperature, used in medicines, dyes, and photography

Front 69

Iodine

Back 69

I

Front 70

Iodine

Back 70

Atomic Number: 53

Front 71

Iodine

Back 71

Atomic Mass: 127

Front 72

Iodine

Back 72

Halogen used as a disinfectant, in photography and as a salt additive that prevents goiter

Front 73

Neon

Back 73

Ne

Front 74

Neon

Back 74

Atomic Number: 10

Front 75

Neon

Back 75

Atomic Mass: 127

Front 76

Neon

Back 76

Inert gas in Group VIII which produces a red glow in lights

Front 77

Argon

Back 77

Ar

Front 78

Argon

Back 78

Atomic Number: 18

Front 79

Argon

Back 79

Atomic Mass: 40

Front 80

Argon

Back 80

Noble gas used in welding active metals, denser that air

Front 81

Krypton

Back 81

Kr

Front 82

Krypton

Back 82

Atomic Number 36

Front 83

Krypton

Back 83

Atomic Mass: 84

Front 84

Krypton

Back 84

An inert element which produces a whitish glow in lights

Front 85

Xenon

Back 85

Xe

Front 86

Xenon

Back 86

Atomic Number: 54

Front 87

Xenon

Back 87

Atomic Mass: 131

Front 88

Xenon

Back 88

First noble gas to from a compound by stripping away electrons, used in photographic lamps

Front 89

Radon

Back 89

Rn

Front 90

Radon

Back 90

Atomic Number 86

Front 91

Radon

Back 91

Atomic Mass 222

Front 92

Radon

Back 92

Radioactive noble gas used in treating cancer, can collect in some buildings producing a health hazard.

Front 93

Sodium

Back 93

Na

Front 94

Sodium

Back 94

Atomic Number 11

Front 95

Sodium

Back 95

Atomic Mass 23

Front 96

Sodium

Back 96

Highly reactive alkali metal of Group I that forms 1+ ions and reacts violently with water, never found free in nature and reacts violently with Chlorine of the halogen family to form common table salt, required in the body fro proper transmission of nerve impulses

Front 97

Potassium

Back 97

K

Front 98

Potassium

Back 98

Atomic Number 19

Front 99

Potassium

Back 99

Atomic Mass 39

Front 100

Potassium

Back 100

Highly reactive member of Group I that reacts violently in water and is required to allow proper transmission of nerve impulses

Front 101

Cesium

Back 101

Cs

Front 102

Cesium

Back 102

Atomic Number: 55

Front 103

Cesium

Back 103

Atomic Mass: 133

Front 104

Cesium

Back 104

Highly reactive Group I metal that is a liquid at warm room temperature, silvery white metal used in making photocells

Front 105

Rubidium

Back 105

Rb

Front 106

Rubidium

Back 106

Atomic Number 37

Front 107

Rubidium

Back 107

Atomic Mass 85

Front 108

Rubidium

Back 108

Soft lustrous metal with one electron in its outer shell, reacts violently with moisture, used in spacecraft engines and photocells

Front 109

Francium

Back 109

Fr

Front 110

Francium

Back 110

87

Front 111

Francium

Back 111

227

Front 112

Francium

Back 112

Extremely rare radioactive Group I metal, contains 136 neutrons and only 87 protons

Front 113

Magnesium

Back 113

Mg

Front 114

Magnesium

Back 114

Atomic Number: 12

Front 115

Magnesium

Back 115

Atomic Mass: 24

Front 116

Magnesium

Back 116

Lightweight member of the alkaline Earth metals of Group II, forms 2+ ions, reacts slowly with water and rapidly with steam, used n making lightweight alloys, found in hydroxide compounds used as antacids

Front 117

Calcium

Back 117

Ca

Front 118

Calcium

Back 118

Atomic Number 20

Front 119

Calcium

Back 119

Atomic Mass 40

Front 120

Calcium

Back 120

Alkaline earth metal found commonly n the Earth's crust, a limestone used in making cement or concrete, often found in pipes or boilers as a result of hard water, forms 2+ ions.

Front 121

Barium

Back 121

Ba

Front 122

Barium

Back 122

Atomic Number 56

Front 123

Barium

Back 123

Atomic Mass 137

Front 124

Barium

Back 124

Massive group II element, a radioisotope of which is used as a radioactive tracer in medicine

Front 125

Radium

Back 125

Ra

Front 126

Radium

Back 126

Atomic Number 88

Front 127

Radium

Back 127

Atomic Mass 226

Front 128

Radium

Back 128

Radioactive Group II element used to treat cancer and in medical research

Front 129

Aluminum

Back 129

Al

Front 130

Aluminum

Back 130

Atomic Number: 13

Front 131

Aluminum

Back 131

Atomic Mass: 27

Front 132

Aluminum

Back 132

Lightweight metal that forms 3+ions, the third most abundant element in the Earth's crust, more valuable that gold or silver prior to development (1886) of the Hall Perot process for extracting it from bauxite

Front 133

Tin

Back 133

Sn

Front 134

Tin

Back 134

Atomic Number: 50

Front 135

Tin

Back 135

Atomic Mass: 119

Front 136

Tin

Back 136

Stable metal used in making cans, forms 2+ and 4+ ions, alloy with copper forms bronze

Front 137

Lead

Back 137

Pb

Front 138

Lead

Back 138

Atomic Number: 82

Front 139

Lead

Back 139

Atomic Mass: 207

Front 140

Lead

Back 140

Stable metal once used for plumbing, symbol comes from Latin name plumbum, forms 2+ and 4+ ions

Front 141

Titanium

Back 141

Ti

Front 142

Titanium

Back 142

Atomic Number: 22

Front 143

Titanium

Back 143

Atomic Mass: 48

Front 144

Titanium

Back 144

Light transition metal used in making strong lightweight alloys, oxidation numbers 4+ and 3+

Front 145

Chromium

Back 145

Cr

Front 146

Chromium

Back 146

Atomic Number: 24

Front 147

Chromium

Back 147

Atomic Mass: 52

Front 148

Chromium

Back 148

Shiny transition metal used in electroplating steel, oxidation numbers 6+, 3+ and 2+

Front 149

Manganese

Back 149

Mn

Front 150

Manganese

Back 150

Atomic Number: 25

Front 151

Manganese

Back 151

Atomic Mass: 55

Front 152

Manganese

Back 152

Transition metal used as catalyst for oxidation-reduction reactions; oxidation numbers 7+, 6+, 4+, 3+, and 2+, used in making alloys

Front 153

Iron

Back 153

Fe

Front 154

Iron

Back 154

Atomic Number: 26

Front 155

Iron

Back 155

Atomic Mass: 56

Front 156

Cobalt

Back 156

Co

Front 157

Cobalt

Back 157

Atomic Number: 27

Front 158

Cobalt

Back 158

Atomic Mass: 59

Front 159

Cobalt

Back 159

Transition metal used to make alloys used to make magnets and heat-resistant tools, oxidation numbers 2+ and 3+, often used to make blue pigments for paints

Front 160

Nickel

Back 160

Ni

Front 161

Nickel

Back 161

Atomic Number: 28

Front 162

Nickel

Back 162

Atomic Mass: 59

Front 163

Nickel

Back 163

Transition metal used in making coins, batteries, jewelry, and electroplating; oxidation numbers 2+ and 1+

Front 164

Copper

Back 164

Cu

Front 165

Copper

Back 165

Atomic Number: 27

Front 166

Copper

Back 166

Atomic Mass: 64

Front 167

Copper

Back 167

Transition metal used in cooking utensils, wiring, plumbing, and electric motors;oxidation numbers 2+, and 1+

Front 168

Silver

Back 168

Ag

Front 169

Silver

Back 169

Atomic Number: 47

Front 170

Silver

Back 170

Atomic Mass: 108

Front 171

Silver

Back 171

Shiny lustrous metal; best conductor of heat and electricity; oxidation numbers 1+ ; used in jewelry, ornaments, mirror, backing, and dental fillings

Front 172

Gold

Back 172

Au

Front 173

Gold

Back 173

Atomic Number: 79

Front 174

Gold

Back 174

Atomic Mass: 197

Front 175

Gold

Back 175

Valuable metal used as base for many money systems; used in jewelry, coins, and dentistry; oxidation numbers 3+ and 1+

Front 176

Cadmium

Back 176

Cd

Front 177

Cadmium

Back 177

Atomic Number: 48

Front 178

Candium

Back 178

Atomic Mass: 112

Front 179

Candium

Back 179

Transition metal used to make yellow pigments in paint, electroplating, batteries, and as control rods in nuclear reactors

Front 180

Mercury

Back 180

Hg

Front 181

Mercury

Back 181

Atomic Number: 80

Front 182

Mercury

Back 182

Atomic Mass: 201

Front 183

Mercury

Back 183

Toxic transition metal, which is a liquid at room temperature; used in thermometers, barometers, electric switches, and paint pigments; alloy with silver that produces dental amalgam

Front 184

Platinum

Back 184

Pt

Front 185

Platinum

Back 185

Atomic Number: 78

Front 186

Platinum

Back 186

Atomic Mass: 195

Front 187

Platinum

Back 187

Transition metal used as catalyst, in electronics, lab ware, and jewelry

Front 188

Tungsten

Back 188

W

Front 189

Tungsten

Back 189

Atomic Number: 74

Front 190

Tungsten

Back 190

Atomic Mass: 184

Front 191

Tungsten

Back 191

Transition metal used in making light-bulb filaments and alloys with high density and high density and high melting point

Front 192

Vanadium

Back 192

V

Front 193

Vanadium

Back 193

Atomic Number: 23

Front 194

Vanadium

Back 194

Atomic Mass: 51

Front 195

Vanadium

Back 195

Transition metal used to make shock resistant steel and used as catalyst

Front 196

Zinc

Back 196

Zn

Front 197

Zinc

Back 197

Atomic Number: 30

Front 198

Zinc

Back 198

Atomic Mass: 65

Front 199

Zinc

Back 199

Transition metal used to galvanize iron, forms alloy with copper called brass, used in dry cell batteries, oxidation number 2+

Front 200

Uranium

Back 200

U

Front 201

Uranium

Back 201

Atomic Number: 92

Front 202

Uranium

Back 202

Atomic Mass: 238

Front 203

Uranium

Back 203

Radioactive member of the antiacid series used ass fuel in nuclear reactors, heaviest natural element

Front 204

Iron

Back 204

Fourth most abundant element in Earth's crust; used in manufacturing, building materials, and dietary supplements; oxidation numbers 3+ and 2+; main component of steel