An element x has 3 valance electrons the form of its sulphate is?
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Y−Third period
∴ Shells =3
Total electrons in valence shell 2+1=3 (2 electrons in s+1 electrons in p)
Valency of x is −1 (1 electrons is received - electro negative atom)
Therefore they combine to form compounds with chemical formula YX3 (Symbol of electropositive element first followed by electro negative element.)
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