Question

1) A molecule of an element is _________ [water/chlorine/ammonia]. 2) A radical with one atom of Sulphur and three atoms of oxygen is _________[bisulphate/sulphate/sulphite]. 3) An element with variable valency is____________[sodium/copper/calcium]. 4) The formula of aluminium sulphate is _____________[AlSO4 / Al2(SO4)3 / Al3(SO4)2].

Answer 1

Explanation:

1.: chlorine(Cl)

2.:sulphite

3:Cu(copper)

4:Al2(SO4)3

Answer 2

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