Group 2 Trends

Question 1

Trend in atomic radius down the group

Answer 1

Atomic radius increases
Number of shells increases
Outer shells are more shielded from the nucleus, are les closely held and move further away

Question 2

Trend in first ionisation energies

Answer 2

First ionisation energy decreases
Increase in shells
Increase in shielding
Outer e- are further from the nucleus so reduced nuclear attraction
Less energy to remove

Question 3

Trend in melting point down group two

Answer 3

Melting point Generally decreases
Down the group metal ions get bigger
Charge and number of delocalised e- doesn’t change
Delocalised e- further from positive nucleus so less attraction
More e- shells so shielding increases
Less energy to break bond