Homework Answers
*One must consider the electron filling of p subshells
*Both nitrogen and phosphorus have one electron in each of the p orbital
*They are half filled and there is no repulsion from electrons in the same orbital
*Oxygen and sulfur both have one p orbital that is filled .The
electronic
repulsion in the filled orbital makes it easier to remove those
electrons
and results in a lower ionization energy for oxygen and sulfur when
compared to
nitrogen and phosphorus respectively.
**********
:) .hope it is helpful
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