Science Quiz- The Periodic Table

Front 1

Mendeleev

Back 1

looked for patterns among the properties of elements in the 1860's--created the periodic table--predicted the properties of the missing elements by using a pattern of properties in the periodic table--thought that the atomic masses were wrong, but they were correct

Front 2

Henry Mosely

Back 2

determined the correct number of protons in an atom--his work improved the periodic table

Front 3

What is the Periodic Law?

Back 3

chemical and physical properties of elements are periodic functions of their atomic numbers

Front 4

The classes of elements and what they are determined by

Back 4

1: metals
2: nonmetals
3: metalloids
determined by the number of valence electrons in the outer shell

Front 5

Metals

Back 5

most elements are metals, atoms of most metals have few valence electrons, solid at room temp, good conductor of thermal energy, ductile, good conductor of electric current, malleable, and shiny

Front 6

Non Metals

Back 6

poor conductor of thermal energy and electric currents, atoms of most nonmetals have an almost complete set of valence electrons, more than half of the nonmetals are gases at room temperature, properties of nonmetals are the opposite of the properties of metals ( not malleable, ductile, or shiny)

Front 7

Metalloids and two examples

Back 7

located between metals and nonmetals on the periodic table,
also called semiconductors,atoms have between 3 and 6 valence electrons, have properties of both metals and nonmetals

Hint 7

Examples: Boron and Tellurium
Tellurium: shiny but brittle
Boron: almost as hard as diamonds but is very brittle, @ high temps, boron is a good conductor of electric current

Front 8

who is responsible for naming elements and what do some names come from

Back 8

an international committee of scientists--some names come from scientists' names and geographic locations

Front 9

What are rows also known as and why?

Back 9

Periods--numbered 1-7, called a period because the properties of elements in a row following a repeating, or periodic pattern as you move across each period,

Front 10

What are columns also known as and why?

Back 10

Columns are also called groups
elements in the same group often have similiar chemical and physical properties
sometimes groups are called families

Front 11

Patterns of chemical symbols

Back 11

1: first letter of the name
2: first two letters of the name
3: first letter and third or later letter of the name
4: Letters of a word other than the english name
5: latin root letters
6: atomic #

Front 12

What type of metal is less reactive than alkali metals and alkali-earth metals?

Back 12

Transition Metals

Front 13

Atoms of what don't give away their electrons as easily as atoms of group 1 or 2?

Back 13

Transition metals

Front 14

What color are many transition metals?

Back 14

silver

Front 15

Lanthanide's and actinide's properties are very-----?

Back 15

similar

Front 16

Lanthanides are found in which period and why?

Back 16

Period 6 because they follow the transition metal lanthanum

Front 17

Lanthanides and their use

Back 17

shiny, reactive metals that are used in the making of steel

Front 18

What Europium is used for

Back 18

to coat the back of television screens to produce the color red.

Front 19

Actinides are found in which period and why?

Back 19

Period 7 because they follow the transition metal actinium.

Front 20

All Actinides are------.

Back 20

radioactive

Front 21

the atoms of what type of elements can change into atoms of a different element?

Back 21

radioactive

Front 22

Elements after ------- do not occur in nature, but are instead produced in laboratories.

Back 22

plutonium

Front 23

What element # is plutonium?

Back 23

94

Front 24

What element is used in smoke detectors?

Back 24

americium

Front 25

What is americium's element number?

Back 25

95

Front 26

Groups 1 and 2 are the most ----- of all the elements.

Back 26

reactive

Front 27

what is the reason for groups 1 and 2s' reactivity?

Back 27

valence electrons

Front 28

Atoms are most stable with ----- electons.

Back 28

eight

Front 29

In order to have a complete set of eight valence electrons, atoms can do what?

Back 29

take, give, or share

Front 30

elements whose elements undergo a process to have a complete set of eight valence electrons are reactive and combine to form what?

Back 30

compounds

Front 31

the atoms of what type of elements can change into atoms of a different element?

Back 31

radioactive

Front 32

Elements after ------- do not occur in nature, but are instead produced in laboratories.

Back 32

plutonium

Front 33

What element # is plutonium?

Back 33

94

Front 34

What element is used in smoke detectors?

Back 34

americium

Front 35

What is americium's element number?

Back 35

95

Front 36

Groups 1 and 2 are the most ----- of all the elements.

Back 36

reactive

Front 37

what is the reason for groups 1 and 2s' reactivity?

Back 37

valence electrons

Front 38

Atoms are most stable with ----- electons.

Back 38

eight

Front 39

In order to have a complete set of eight valence electrons, atoms can do what?

Back 39

take, give, or share

Front 40

elements whose elements undergo a process to have a complete set of eight valence electrons are reactive and combine to form what?

Back 40

compounds

Front 41

elements whose atoms need to take give or share only one or two valence electrons tend to be -----------.

Back 41

very reactive

Front 42

Elements in groups 1 and 2 are so reactive that ----------------.

Back 42

They are only found combined w. other elements in nature.

Front 43

To study elements in groups 1 and 2, scientists first need to-------- though-------------.

Back 43

seperate the naturally occuring compounds by breaking them apart through chemical changes.

Front 44

What type of metals are soft enough to be cut with a knife?

Back 44

Alkali Metals

Front 45

Which elements are less dense than water?

Back 45

Lithium, sodium, and potassium

Front 46

Which type of metal is most reactive?

Back 46

Alkali Metal

Front 47

How many valence electrons do Alkali Metals have?

Back 47

1

Front 48

What must be done to Alkali Metals to prevent them from reacting w. water and/or the oxygen in the atmosphere?

Back 48

They must be stored in oil.

Front 49

What is Sodium Hydroxide used for?

Back 49

to unclog your drain

Front 50

Potassium Bromide

Back 50

one of the several Potassium compounds used in photography

Front 51

What type of metals aren't as reactive as Alkali metals?

Back 51

Alkaline- Earth Metals

Front 52

How many valence electrons do Alkaline Earth Metals have?

Back 52

2

Front 53

Magnesium is often------- to make---------

Back 53

mixed w. other metals to make low-density materials used in airplanes

Front 54

Compounds of calcium are found in---------

Back 54

cement, plaster, chalk, and people

Front 55

Why are alkali metals more reactive than alkaline earth metals?

Back 55

Because their atoms can easily give away the single electron in their outer shell

Front 56

Why are neither the alkali metals nor the alkaline earth metals found uncombined in nature?

Back 56

Because they are too reactive to be alone.