1.4 Elements of Group 7

Question 1

State one use of chlorine

Answer 1

Answers can range from: Used to destroy bacteria, makes water safe to drink and swim in

Question 2

What is another name for Group 7?

Answer 2

Halogens

Question 3

What are the names of the elements in Group 7

Answer 3

Chlorine, Fluorine, Iodine and Astatine

Question 4

Do halogens have a high or low melting point?

Answer 4

The halogens have a low melting point like most non metals. They do not conduct or produce electricity

Question 5

What are the physical properties in Group 7?

Answer 5

The melting point increases from top to bottom. This is a bit different to Group 1 as it decreases from top to bottom. In Group 7 the elements get darker from top to bottom and as well as this they are reactive

Question 6

What are displacement reactions?

Answer 6

A more reactive element can displace a less reactive element out of its compound during a chemical reaction.
Displacement reactions can be used to investigate the reactivity of metals and extract metals from metal oxides.