2b- Group 7 (halogens) ❗️

Question 1

Group 1 metal + water —>

Answer 1

Metal hydroxide + hydrogen

Question 2

Describe the metal hydroxides formed

Answer 2

Colourless, aqueous solutions, same general formula

Question 3

What do alkali metals form when reacting with oxygen?

Answer 3

Metal oxides

Question 4

Describe fluorine at room temperature

Answer 4

Yellow gas

Question 5

Describe chlorine at room temperature

Answer 5

Pale yellow/green gas

Question 6

Describe bromine at room temperature

Answer 6

Red/brown liquid

Question 7

Describe iodine at room temperature

Answer 7

Purple/black solid

Question 8

What does iodine sublime to form?

Answer 8

Purple vapour

Question 9

What colour is chlorine in solution?

Answer 9

Pale green

Question 10

What colour is bromine in solution?

Answer 10

Orange

Question 11

What colour is iodine in solution?

Answer 11

Dark brown

Question 12

What happens to the melting/boiling points of the halogens as you go down the group?

Answer 12

They increase

Question 13

What happens to the colour of the halogens as you go down the group?

Answer 13

They get darker

Question 14

What do halogens form when reacted with some metals?

Answer 14

Ionic compounds which are metal halide salts

Question 15

What happens to the reactivity of the halogens as you go down the group?

Answer 15

It decreases