Group 7 & Group 0 (Halogens & Noble Gases)

Question 1

Halogen group 7

Answer 1

Fluorine: Poisonous yellow gas which is very reactive

Chlorine: is very reactive and it is a poisonous green gas

Bromine: Is a brown volatile liquid (poison)

Iodine: Dark grey which can form purple vapours and it is also and antiseptic

There ions have 1- charge

Question 2

What are diatomic molecules

Answer 2

They both share 2 atoms

Question 3

What is the trend for group 7 when you go down the group

Answer 3

The melting and boiling point increases and
The reactivity decreases

The larger atoms are least reactive

Question 4

What happens when an halogen
(Ions)

Answer 4

Gains it’s called an halide
Fluoride
Chloride
Bromide

Question 5

Displacement reactions

Answer 5

The more reactive element displaces the less reactive one example fluoride displaces iodine

Question 6

Noble gases

Answer 6

They are colourless and they are inert (they don’t react with anything)

They are non-flammable

But there boiling point decreases as you go down the group

Question 7

What are the colour of water halogens

Answer 7

•Bromine water is orange
•Chlorine water is colourless
•Iodine water is brown