Alkali Metals And Halogens

Question 1

What group are alkali metals?

Answer 1

Group 1

Question 2

Name the physical properties of alkali metals.

Answer 2

Soft
Low melting points
Low densities

Question 3

Describe the trend of alkali metals down the group.

Answer 3

Melting and boiling points decrease
Reactivity increases

Question 4

Name the chemical properties of alkali metals.

Answer 4

1 valence electron
Metal + water -> metal hydroxide and hydrogen
Metal + oxygen -> metal oxide

Question 5

What group are halogens?

Answer 5

Group 7

Question 6

Name the physical properties of halogens.

Answer 6

Fluorine gas = yellow
Chlorine gas = yellow green
Bromine liquid = red brown
Iodine solid = black

Question 7

Describe the chemical properties of halogens.

Answer 7

7 electrons in outer shell
Non metals
Diatomic
Form halide ions
More reactive halogen displace less reactive halide ion in aqueous solution

Question 8

Describe the trends of halogens down the group

Answer 8

Colour darker
Density increase
Melting and boiling points increase
Reactive decrease