2.2 Group 2

Question 1

Atomic Radius

Answer 1

Increases down group

More energy levels

Question 2

Ionization Energy

Answer 2

Decreases Down Group
More energy levels
Larger radius, more shielding
less electrostatic attraction of valence e and nucleus

Question 3

Electronegativity

Answer 3

Decreases Down Group
More energy levels
Larger radius, more shielding
less electrostatic attraction of valence e and nucleus

Question 4

Reaction with Oxygen

Answer 4

Mg+ H2O(g)–> MgO +H2

X +H2O (l) –> X(OH)2+ 0.5 H2

Question 5

Solubility of Hydroxides

Answer 5

Increases down group

Question 6

Solubility of Sulphates

Answer 6

Decreases down group

Question 7

Sulphate Test

Answer 7

HCl (get rid of carbonate ion) not H2SO4 false positive

+BaCl (makes BaSO4 white ppt)

Question 8

Use of Mg(OH)2

Answer 8

indigestion remedy

Question 9

Use of Ca(OH)2

Answer 9

neutralize crop acid field

Question 10

Use of Ba(SO4)2

Answer 10

in X-Rays, cant be absorbed into blood because insoluable

Question 11

Ti Extraction

Answer 11

TiO2 +2Cl2

then TiCl4+Mg