Define valence of an atom.find out the valiancy of chlorine and magnes

1.	Define valence of an atom.find out the valiancy of chlorine and magnesium.
Answer» Valence of an atom is defined as the no. Of atom present in their outermost shell.Valency;Chlorine= 2, 8, 7 = 8-7 = 1 Valency of Cl is 1.Magnesium= 2,8,2 So, Valency of Mg is 2. Mm

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