Reaction with water :-Metals react with water to form metal oxides or metal hydroxides and hydrogen.
The reactivity of different metals with water is different :– Sodium and potassium react violently with cold water to form sodium hydroxide and hydrogen and catches fire. – Calcium reacts less violently with water to form calcium hydroxide and water and does not catch fire. – Magnesium reacts only with hot water to form magnesium hydroxide and hydrogen. – Metals like aluminium, iron and zinc react only with steam to form the metal oxides and hydrogen. – Metals like lead, copper, silver and gold do not react with water.