Question

Does oxygen have high ionization energy?

Answer 1

• Ionization energy is the minimum amount of energy required when their is a removal of electron from isolated gseous atom.
• No, oxygen does not have high ionization energy. This is due to an electron being added to an already half full orbital in oxygen, which results in electron electron repulsion , which will lower the ionization energy.
• Electronic configuration of $\mathrm{O}$(atomic no.-$8$) is: $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^4$
• The first ionization energy of oxygen is $13.6181\mathrm{eV}$