(a) Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
(a) Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3.
(i) Write equations to show how X and Y form ions.
(ii) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
(iii) If the compound formed between X and Y is melted and an electric current is passed through the molten compound, the element X will be obtained at the ……… and Y at the ……….. of the electrolytic cell.
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