Question

Valancies,formulas of metals and non metals

Answer 1

If you want to find a valency whether it’s a metal or an non-metal then see there valence electrons

i.e. the number of electrons in the outer most shells then see if the valency is 1,2 or 3

then it would be an metal thus loosing 1,2,3 electrons and having:+1,+2, 3+ valency respectively.

If the number of electrons are in the outer most shell are 5, 6, 7 then that element can accept 1, 2 or 3 electrons having -1, -2, -3 valency

and that element will show non metallic character.

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Rocky singh ♥