Elememets 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, bromine, Tennessine 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.

Question 7

What are the trends of group 7 elements?

Answer 7

Down group 7, the melting and boiling points increase.

Question 8

What happens in a displacement reaction?

Answer 8

A displacement reaction occurs when a more reactive element displaces a less reactive element from a compound .

Question 9

Properties of Group 7

Answer 9

1. Highly Reactive
2. Diatomic Molecules
3. Physical States
4. Toxic and Corrosive
5. Form Salts
   Halogens readily combine with metals to form ionic salts (e.g., sodium chloride, NaCl).
6. Melting and Boiling Points decreases
7. Displacement Reactions

Question 10

What reactivity trend is observed in the reactivity of Group 7 elements?

Answer 10

Reactivity decreases as you move down Group 7. Fluorine is the most reactive, while iodine and astatine are much less reactive.