Group 7 - The Halogens

Question 1

What are group 7 elements called?

Answer 1

Halogens

Question 2

Describe the properties of halogens (reactivity, boiling/melting points)

Answer 2

As you go down the group the elements become less reactive, because it’s harder to gain electrons.
As you go down the group, the melting and boiling points increase

Question 3

Describe Fluorine

Answer 3

Very reactive, poisonous yellow gas

Question 4

Describe Chlorine

Answer 4

Fairly reactive, poisonous, dense green gas

Question 5

Describe Bromine

Answer 5

Dense, poisonous, red-brown volatile liquid

Question 6

Describe Iodine

Answer 6

Dark grey crystalline solid OR a purple vapour

Question 7

Name 4 halogens

Answer 7

Fluorine, Chlorine, Bromine, Iodine

Question 8

Halogens exist as molecules which are …

Answer 8

Pairs of atoms

eg, F₂

Question 9

The halogens form [ ] ions called [ ], when they bond with metals

Answer 9

1-

Halides

Question 10

The halogens form [ ] bonds with [ ]

Answer 10

Ionic, Metals

Question 11

A more reactive halogen can [ ] a less reactive halogen from an [ ] solution of its salt

Answer 11

displace

aqueous