3.1.2 group 2

Question 1

explain the trend in reactivity for group 2

Answer 1

atomic radius increases, number of shells increase, shielding increase outweighs increase in nuclear charge
so nuclear attraction decreases
or outer electrons experience less attraction
so lower ionisation energy
or lower energy required to remove valent electrons

Question 2

uses of group 2 compounds

Answer 2

Ca(OH)2 to neutralise acid in soils, Mg(OH)2 and CaCO3 as antacids in treating indigestion, MgSO4 and CaCl2 as anhydrous salts in drying