Why nitrogen has more ionization potential than oxyge

Q. Why first ionization enthalpy of nitrogen is more than oxygen?

Q. The ionization potential$\left(I_1\right)$ of nitrogen ($Z=7$) is more than oxygen ($Z=8$). This is explained by :

Q. Among the second period elements the actual ionization enthalpies are in the increasing order Lithium Boron beryllium carbon oxygen nitrogen fluorine and neon. Then explain why beryllium has higher ionization enthalpy than Boron and oxygen has lower ionization enthalpy than nitrogen and fluorine

Q. Assertion :Nitrogen has higher ionization energy than that of oxygen. Reason: Nitrogen has smaller atomic size than that of oxygen.

Q. Ionization enthalpy of nitrogen is more than oxygen because of: