Question

how will you find the valency of chlorine Sulphur and magnesium​

Answer 1

Explanation:

Valency of an atom is the number of electrons gained, lost or shared so as to complete the octet of electrons in the valence shell.

Valency of chloride: It has electronic configuration = 2, 8, 7

Thus, one electron is gained to complete its octet and so its valency is 1.

Valency of sulphur: Its has electronic configuration = 2, 8, 6

Thus, 2 electrons are gained to complete its octet and hence its valency = 2

Valency of magnesium : It has electronic configuration = 2, 8, 2

Thus, it can lose two electrons to attain octet and hence its valency = 2

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