Unit 2

Question 1

Atomic number

Answer 1

How many protons it contains

Question 2

Mass number

Answer 2

Tells you how many protons and neutrons in total

Question 3

Why does an atom have no charge

Answer 3

because it has the same amount of protons and electrons

Question 4

Prótons have a …. Charge

Answer 4

Positive

Question 5

Electrons have a ….. charge

Answer 5

Negative

Question 6

Neutrons have a …. Charge

Answer 6

Neutral

Question 7

What are electrons arranged in

Answer 7

Electron shells around the nucleus

Question 8

Alkali metals

Answer 8

The atomic number and the mass number increases as you go down the group

Melting points go down

Question 9

The melting point of sodium predict
When the melting point of lithium is 180 and potassium is 64

Answer 9

Below 180 and above 64

Question 10

The boiling point of potassium when

Sodium is 883
And rubidium is 688

Answer 10

Below 883 and above 688

Question 11

The elements which lithium sodium potassium and rubidium all react with water to produce a gas name the gas

Answer 11

Hydrogen

Question 12

Predict the reaction between sodium and water

Answer 12

Give of bubbles and gives of heat more than lithium but not more than potassium

Question 13

What does the mass number tell you about each element

Answer 13

Number of protons and electrons

Question 14

Why is fluorine ion more stable than a fluorin atom

Answer 14

Ion is a more stable than an atom has it had a full outer shell

Question 15

The symbol for fluorine is and F write the symbol for a fluorine ion

Answer 15

F— because it gains an electron

Question 16

Ionic bonds or covalent

When a metal joins with a non metal to form a compound

Answer 16

Ionic

Question 17

Ionic bonds or covalent

When two atoms share electrons

Answer 17

Covalent bond

Question 18

Ionic bonds or covalent

When two non metals join together

Answer 18

Covalent bond

Question 19

Ionic bonds or covalent

When a compound that is dissolved in water conducts electricity

Answer 19

Ionic bound

Question 20

Ionic bonds or covalent

When atoms gain or lose electrons

Answer 20

Ionic bond

Question 21

Write the formula for a molecule of methane when it has 4H and 1C

Answer 21

CH4

Question 22

What holds a lattice together

Answer 22

The equal and opposite electrostatic forces makes them very attached

Question 23

What does this lattice structure tell you about the melting point and boiling point of sodium chloride

Answer 23

The strength that holds the lattice together is so strong because if electrostatic forced that the melting and the boiling point is high

Question 24

Group 1 metals properties

Answer 24

Produce hydroxide
Alkali gas
Soft gas

Question 25

1-7 is

Answer 25

Unstable

Question 26

Symbol when an element loses

Answer 26

+

Question 27

Symbol when an element gains

Answer 27

-

Question 28

Molecule when does it occur

Answer 28

Occurs when you share electrons- covalent forced

Question 29

Irons

Answer 29

Electrostatic

Question 30

Atoms

Answer 30

They lose or gain electrons when their energy isn’t stable because it doesn’t have the maximum electrons

Question 31

Compound

Answer 31

Substance which is formed by 2 or more elements

Question 32

Lattice giant is a structure of

Answer 32

Ions

Question 33

Graphite giants

Answer 33

Is a structure or carbons

Question 34

Ionic properties

Answer 34

High melting temperature and boiling points strong electrostatic

Question 35

Ionic compound

Answer 35

Gains or loses electrons

Question 36

Covalent compound

Answer 36

Shares electrons