In the Lewis structure of AB4 where B is more electronegative than A. Both are main group elements where A has 8 valence

Question

In the Lewis structure of AB4 where B is more electronegative than A. Both are main group elements where A has 8 valence electrons and each B has 7 valence electrons.
What is the total number of valence electrons?
How many lone pairs are in the molecule?

Kunduz · Accepted Answer

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