Group 2

Question 1

What are group 2 known as?

Answer 1

Alkaline earth metals

Question 2

What is the trend in atomic radius for group 2? Why?

Answer 2

Increase
> more e- shells

Question 3

What is the trend in first ionisation energy for group 2? Why?

Answer 3

Decrease
> greater atomic radius
> increased shielding

Question 4

What is the trend in melting point for group 2? Why?

Answer 4

Decrease
> cations get bigger
> e- further away from nucleus
> decreases nuclear attraction

Question 5

What is produced when a group 2 metal reacts with water?

Answer 5

Metal hydroxide (aq) + hydrogen (g)

Question 6

What is the trend in vigour when a group2 metal reacts with water?

Answer 6

Increase
> except Mg

Question 7

What is observed when Mg reacts with steam?

Answer 7

Bright white flame + white powder forms

Question 8

What is produced when Mg reacts with steam?

Answer 8

MgO (s) + hydrogen (g)

Question 9

What is Mg used to extract in what reaction?

Answer 9

Ti from TiCl4
Displacement

Question 10

What is the trend in hydroxide solubility for group 2?

Answer 10

Increases

Question 11

How is Mg(OH)2 used in medicine?

Answer 11

Relieve indigestion
> sparingle soluble
> neutralises stomach acidity

Question 12

How is Ca(OH)2 used in
agriculture?

Answer 12

Neutralise acidic soil
> reasonably/partially soluble

Question 13

What is the use of CaO or CaCO3? Why?

Answer 13

Remove SO2 fro flue gases
> prevents it from being released into the atomsphere

Question 14

What is the trend in sulfate solubility for group 2?

Answer 14

Decrease

Question 15

How is BaSO4 used in medicine?

Answer 15

Barium meals
> insoluble
> won’t be absorbed into blood
> allows internal imaging