Group 1 and 7

Question 1

What do group 7 atoms form when they react with metals?

Answer 1

A wide range of salts

Question 2

Which of the group 7 atoms form diatomic molecules?

Answer 2

All of them

Question 3

How do the melting and boiling points change as you go down the group?

Answer 3

They increase

Question 4

How does the reactivity of the atoms change as you go down the group?

Answer 4

It decreases as you go down

Question 5

What colour and state is fluorine at RT?

Answer 5

A gas

Yellow

Question 6

What state and colour is chlorine at RT?

Answer 6

Gas

Green

Question 7

What state and colour is bromine at RT?

Answer 7

Liquid

Dark red liquid/reddy-brown vapour

Question 8

What state and colour is iodine at RT?

Answer 8

Solid

Dark grey solid/purple vapour

Question 9

When halogens react with iron, what is formed?

Answer 9

Metal halides

Question 10

Chlorine + sodium bromide →?

Answer 10

Sodium chloride + bromine (displacement)

Question 11

What causes the colour change when two solutions interact?

Answer 11

The displaced element