Periodic table group 0,1,7

Question 1

In terms of electrons, what do group 1 elements have in common?

Answer 1

1 electron in the outer shell

Question 2

In terms of electrons, what do group 7 elements have in common?

Answer 2

7 electrons in the outer shell

Question 3

In terms of electrons, what do group 0 elements have in common?

Answer 3

Full outer shell

Question 4

What is more reactive, lithium or sodium?

Answer 4

Sodium

Question 5

What is more reactive, chlorine or bromine?

Answer 5

Chlorine

Question 6

Define inert

Answer 6

Unreactive

Question 7

Explain why the noble gases are inert

Answer 7

They have full outer shells, so do not need to gain or lose electrons

Question 8

What is a trend?

Answer 8

A pattern in properties

Question 9

State the trend in the melting points of the alkali metals

Answer 9

Gets lower down the group

Question 10

What state is fluorine at room temperature?

Answer 10

Gas

Question 11

What state is chlorine at room temperature?

Answer 11

Gas

Question 12

What state is bromine at room temperature?

Answer 12

liquid

Question 13

What state is iodine at room temperature?

Answer 13

solid

Question 14

Balance the equation: Li + H?O ? LiOH + H?

Answer 14

2Li + 2H? ? 2LiOH + H?

Question 15

Balance the equation: K + H?O ? KOH + H?

Answer 15

2K + H? ? KOH + H?

Question 16

Name LiOH

Answer 16

Lithium hydroxide

Question 17

Name KOH

Answer 17

Potassium hydroxide

Question 18

Explain why the group 1 elements are called alkali metals

Answer 18

They are metals that form alkalis when they react with water

Question 19

What is a displacement reaction?

Answer 19

A reaction in which a more reactive element takes the place of a less reactive element in a compound

Question 20

Explain why the following reaction does not proceed: KBr + I?

Answer 20

Iodine is less reactive than bromine so cannot displace it

Question 21

Balance the below equation and explain why it is a displacement reaction: KBr + Cl? ? KCl + Br?

Answer 21

2KBr + Cl? ? 2KCl + Br? , chlorine has displaced bromine as it is more reactive

Question 22

Explain why fluorine is more reactive than chlorine

Answer 22

Fewer shells/electrons, less shielding (or stronger attraction from nucleus), easier to gain electrons

Question 23

Explain why potassium is more reactive than lithium (3 marks)

Answer 23

More shells/electrons, less shielding (or weaker attraction from nucleus), easier to lose electrons

Question 24

Explain why bromine is less reactive than chlorine (3 marks)

Answer 24

More shells/electrons, more shielding (or weaker attraction from nucleus), harder to gain electrons

Question 25

Explain why sodium is less reactive than caesium (3 marks)

Answer 25

Fewer shells/electrons, less shielding (or stronger attraction from nucleus), harder to lose electrons