Thank you very much; that does clear up that part for me.
Can you get something similar happening with some other elements, say ones that are also in period two, but with more electrons like Oxygen, nitrogen or fluorine? I don't understand how it works when the 2p shell is more full than in...
I'm struggling with the idea of hybridisation of orbitals.
Let's start with sp^2 hybridisation of carbon, so for example in graphene.
So C valence electrons ground state configuration is: 2s^2 2p^2
But am I right in saying that one of the 2s electrons is promoted to 2p, so that we have...