Group 2

Question 1

Describe trend in atomic radius down group 2

Answer 1

Increases

Question 2

Explain trend in atomic radius down group 2

Answer 2

More shells so bigger atoms

Question 3

Describe trend in ionisation energy down group 2

Answer 3

Decreases

Question 4

Explain trend in ionisation energy down group 2

Answer 4

Bigger atomic radius, more shielding so weaker attraction between nucleus and outer shell electron

Question 5

Describe trend in melting point down group 2

Answer 5

Generally decreases

Question 6

Explain trend in melting point down group 2

Answer 6

Decrease - weaker metallic bonding as ions bigger

Question 7

Mg uses

Answer 7

Extract Ti from ore rutile (TiO2)

Question 8

BaSO4 uses

Answer 8

Barium meal

Question 9

Mg(OH)2 uses

Answer 9

Milk of magnesia

Question 10

Ca(OH)2 uses

Answer 10

Slaked lime

Question 11

CaO use

Answer 11

Flue gas desulfurisation

CaO + SO2 –> CaSO3

Question 12

CaCO3 uses

Answer 12

Limestone/Calcium carbonate

Question 13

What happens when an ionic substance dissolves?

Answer 13

ions separate and mix in with water

Question 14

what happens when you mix two solutions of ionic compounds

Answer 14

no reaction or precipitate forms

Question 15

solubility of group 2 sulfates?

Answer 15

MgSO4 - soluble
CaSO4 - slightly soluble
SrSO4 - insoluble
BaSO4 - insoluble

Question 16

solubility of group 2 hydroxides?

Answer 16

Mg(OH)2 - insoluble
Ca(OH)2 - slightly soluble
Sr(OH)2 - soluble
Ba(OH)2 - soluble