1 a) Show the formation of Na2O by the transfer of electrons.
b) Name the cation and anion.
c) Write two properties of ionic compounds.
2 a) Differentiate between roasting and calcination used in metallurgy. Give an example of each.
b) Give reasons for:
i) Hydrogen gas is not evolved when most metals react with nitric acid.
ii) Platinum, gold and silver are used to make jewellery.