Group 2 Flashcards
1
Q
Why does the IE of period 3 dip
A
Increased nuclear charge
Decreased atomic radius
Same shielding
energy needed
2
Q
Why does the IE graph dip at group 6
A
The e- are paired up in the same suborbital so repulsion, less energy needed
3
Q
What happens to IE down group 2
A
Decreased, larger atomic radius, increased shielding, weaker forces, less energy needed
4
Q
Trend of mp down group 2
A
Decreases, sea of delocalised e- is further from positive centre, weaker metallic bonbd
5
Q
Whats Ca(OH)2 used for
A
Neutralise soil
6
Q
Whats Mg(OH)2 used for
A
Indigestion tablets
7
Q
What’s BaSO4 used for
A
Barium meal, used for X-rays
8
Q
How to test for BaCL2
A
Add to HCL, white ppt will form if sulphate ions are present
