These are the two resonating strctures of NO given in my textbook. In the first resonating structure, oxygen is shown to have 9 electrons. How can that be possible since oxygen does not have the third shell so it has no orbital available to accommodate any more electron?
Also, why don't elements donate only one electron in such cases. I know unpaired electrons cause repulsions but in cases like NO where its not possible to avoid an unpaired electron, cannot oxygen donate only one electron to nitrogen. If it does that, we could have this structure. Is this structure possible?
Also, just out of curiosity, between oxygen and nitrogen, on whom will be one electron pair more stable? I am not able to decide this on the basis of electronegativity.