Do nonmetals have high ionization energy ?

1. Ionization energy is the minimum energy required to remove the loosely bound electron of the gaseous atom.
2. Ionization energy tends to decrease in going from top to bottom of a group of the periodic table.
3. Non-metals are found in the right-hand region of the periodic table.
4. Non-metals have high ionization energy because non-metals have the tendency to gain electrons.
5. This tendency makes them have more electrons in the valence shell and thus have more ionization energy.

Therefore, Non-metals have the high ionization energy