group 2

Question 1

atomic radius

Answer 1

increases as we go down group 2
extra shells added as we go down group 2

Question 2

group 2 1st ionisation energy

Answer 2

1st ionisation energy decreases
reactivity increase as we go do down group 2
extra shells added
more shielding so weaker attraction between nucleus and outer electrons
easier and less energy needed to remove outer electron

Question 3

g2 + water

Answer 3

= base
metal hydroxides
sr (s) + 2h20 (l) → sr(oh)2 (aq) +h2 (G)

Question 4

magnesium

Answer 4

reacts slow with cold water
fast with steam
magnesium oxide formed

Question 5

g2 + o2

Answer 5

base metal oxides
white solids
2mg(s) +o2(g) → 2MGO

Question 6

g2 + hydroxides

Answer 6

bases
neutralise acids

Question 7

oxide

Answer 7

cao +2hcl → cacl2 + h2o

Question 8

hydroxide

Answer 8

ca(oh0)2 + 2hcl → cacl2+ 2h20

Question 9

calcium hydroxide use

Answer 9

used to neutralise acidic soils

Question 10

Magnesium hydroxide

Answer 10

used to neutralise excess stomach acid

Question 11

formation

Answer 11

enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions