group 2 Flashcards
1
Q
what do the group 2 elements form?
A
2+ ions
2
Q
what is the outer electron configuration for group 2 elements?
A
s2
3
Q
state the trend in atomic radius down the group
A
increases
4
Q
state the trend in ionisation energy down the group
A
decreases
5
Q
describe the trend in reactivity down the group
A
- increases
- due to increased shielding and atomic radius
- weaker nuclear attraction
6
Q
describe the reaction of group 2 elements with water
A
- forms metal hydroxides
- reactivity increases down group
- Mg reacts vigourously with steam
7
Q
describe the reaction of group 2 elements with oxygen
A
- forms metal oxides
- white solids
8
Q
describe the reaction of group 2 oxides with water
A
- forms hydroxides
- alkaline solution
9
Q
describe the trend in alkalinity down the group
A
- increases
- as solubility increases
10
Q
state the reaction between group 2 oxides and hydroxides
A
neutralisation
11
Q
state the use of a group 2 hydroxide
A
- calcium hydroxide neutralises acidic soil
- magnesium hydroxide neutralises excess stomach acid
