The Halogens

Question 1

What happens as the atomic number of Halogens increases?

Answer 1

The elements have a darker colour and a higher boiling point

Question 2

Chlorine at room temperature

Answer 2

A fairly reactive, poisonous, green gas

Question 3

Bromine at room temperature

Answer 3

A poisonous, red-brown liquid which gives off orange vapour at room temperature

Question 4

Iodine at room temperature

Answer 4

A dark grey crystalline solid which gives off purple vapour when heated

Question 5

How does reactivity change as you go higher in the Halogens

Answer 5

It increases

Question 6

Reactivity series going down group 7

Answer 6

1) Halogens only need to gain one electron to form a 1- ion with a stable electronic structure.
2) The easier it is for the halogen to attract the electron, the more reactive it is.
3) As you go down group 7, the elements get less reactive because it is harder to attract that extra electron.
4) This is because it is further away from the nucleus.