Group 7

Question 1

What are group 7 non metals known as

Answer 1

Halogens

Question 2

What do all halogens exist as

Answer 2

Molecules which are pairs of atoms

Question 3

What are the trends as you go down the group

Answer 3

Become less reactive, harder to gain an extra electron because the outer shell is far from the nucleus
Higher melting and boiling points
Higher relative atomic masses

Question 4

Why do all group 7 elements react in similar ways

Answer 4

They all have seven electrons in their outer shell

Question 5

What do halogens form with other non- metals

Answer 5

They can share electrons via covalent binding to achieve a full outer shell

Question 6

What kind of compounds does it form when halogens react with non metals

Answer 6

Simple molecular structures

Question 7

What do halogens form when they react with metals

Answer 7

Ionic bonds
1- ions called HALIDES
The compounds that form have ionic structures

Question 8

When can a displacement reaction occur

Answer 8

Between a more reactive halogen and a less reactive halogen from an aqueous solution from its salt