Question

based on the group valency of elements state the formula and justify:
coumpounds formed when an element of group 2 combines with an element of group 16.

Answer 1

Let the group belonging to group 2 be X
And group 16 be Y

GROUP 2 HAVE VALENCY 2
GROUP 16 HAVE VALENCE ELECTRONS HAS 6 SO VALENCY WILL BE 2

SO FORMULA WOULD BE X2Y2 WHICH CAN BE WRITTEN AS XY

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