How can I determine the number of valence electrons there are in a molecule?

Author Question: How can I determine the number of valence electrons there are in a molecule? (Read 823 times)

futuristic

Hero Member
Posts: 638

on: Sep 20, 2013

Referring to the periodic table?
Is it true that the number of valence electrons = the last digit of the group number they belong to?

So C (carbon) would have four valence electrons since it belongs to group 14 right?

notis

Hero Member
Posts: 596

Reply #1 on: Sep 20, 2013

Yes, but that only works for groups 1-2, and 13-18.

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