00:01
To determine the bond order, we first need to represent the molecular orbitals.
00:06
For each of these, we have sigma 2s and then sigma 2s star.
00:16
Just above that, we have sigma 2p and then pi sigma 2p and pi 2p.
00:30
And then we have pi 2p star and sigma 2p star.
00:42
So for o2 we've got a total of 12 valence electrons.
00:51
Each oxygen has six and there are two of them.
00:58
So if we add these in we've got we've got 1, 2, 3, 4, 5, 6.
01:04
We go lowest energy level first.
01:06
Then we singly occupy degenerate orbitals before doubling up.
01:11
So 2, 4, 6, 8, 10, 12.
01:17
To determine bond order, that'll simply be equal to 1 half...