Group 2 Metals Flashcards
1
Q
Trend in atomic radius group 2
A
- Increases
- more shells
- more shielding
2
Q
Trend 1st ionisation energy group 2
A
- Trend decreases
- more shells
- more shielding
- weaker forces of attraction from nucleus to electron in outer shell
3
Q
General trend in melting point group 2
A
- general decrease
- weaker METALLIC BONDING
- as metal IONS are bigger
- so lower melting point
- weaker forces of attraction b/w positive ion and delocalised electrons
4
Q
Group 2 reactivity
A
Becomes more reactive down the group
- metals react - lose two outer shell electrons
- down group, atoms become bigger and there is more shielding
- weaker forces of attraction between nucleus and outer shell electrons and so the outer shell electrons are more easily lost
5
Q
What does group 2 and water create
A
Metal Hydroxide and hydrogen
6
Q
Why does reactivity down group 2 increase
A
- metals lose two outer shell electrons
- atoms become bigger
- more shells; more shielding
- weaker forces of attraction between nucleus and outer shell electrons so outer shell electrons are more easily lost
7
Q
Magnesium and water
- Observation
- Equation
A
8
Q
Calcium and water
- Observation
- Equation
A
9
Q
Sr and water
- Observation
- Equation
A
10
Q
Barium and water
- Observation
- Equation
A
11
Q
Two types of reactions with magnesium
A
- Water in redox reaction
2. Steam
12
Q
Magnesium with steam
A
13
Q
Solubility of hydroxides
A
More soluble going down
14
Q
Solubility of sulphates
A
Less soluble going down
15
Q
Uses of Barium sulphate
A
Medical: used for x-ray for the digestive system
20
Q
Uses of magnesium
A
Metal extraction
21
Q
Why is the insolubility of barium sulphate useful
A
22
Q
Metal extraction and what type of reaction is it?
A
