CHEMISTRY COMMUNITY

Hi guys! I have a couple of questions about ionization energies. Would there be any other exceptions that we have to know other than oxygen for ionization energy trends? Are there any other exceptions due to electron repulsions for the typical ionization energy trend?
Thanks

I think for ionization energy is that B is lesser than Be and O is lesser than N because of the half filled and fully filled orbitals of N and Be is more stable (require more energy to ionize an electron)