an element X forms an oxide with formula X₂O₃

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state the valency of X,write the formula of chloride of X and sulphate of X.

An element X forms an oxide with formula X₂O₃:

1. Valency of X = +3

2. Chloride of X = XCl₃

3. Sulphate of X = X₂(SO₄)₃

For example: X = Al

Chloride of Al = AlCl₃

Sulphate of Al = Al₂(SO₄)₃