00:01
For this particular molecule, a hydrocarbon, we've got carbon with three hydrogens coming off of it, each being a sigma bond.
00:12
We then have that bonded to another carbon with one hydrogen coming off of it, bonded to another carbon after that, with no hydrogens coming off of it, and then a carbon with two hydrogens coming off of it.
00:35
So in order for the carbons to have an octet, we need to put a double bond here.
00:44
Now this carbon has an octet.
00:46
This one doesn't, nor does this one, but if we put a double bond here, then we will get an octet.
00:54
That gives us a total of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 19, 20, 21, 22, valence electrons...