eli5: how does the number of unpaired valance electrons determine the number of bonds an atom makes?
In: Chemistry
I believe your question is : why does a molecule want such a specific electron configuration that is will want to create valence shells in the first place? If that is your question, then the eli5 answer would be these electronic configurations represent a low energy point that the nucleus/electron cloud system wants to reach. A bit like why are bubbles round and not square. It’s a system trying to minimize its energy.
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