Question

Arrange in icreasing order of ionozation enthalpy c,o,n,b,be

Answer 1

According to ionisation enthalpy if it has small size , the attractions on the outer electrons by the nucleus is more so it is not easy to remove the electron. Hence it requires more energy to remove the electron. The required energy is nothing but ionisation energy/ ionisation enthalpy.

If we move from left to right in the periodic table oxygen has smaller size and beryllium has larger size so in this case oxygen must have more ionization enthalpy but when we take nitrogen, nitrogen has half filled configuration that is it has 3 electrons in the p orbital its outer most orbital ,it means that it is some what stable. If we want to remove electron it requires more energy.

so it is not that easy as oxygen to remove the electrons so nitrogen has more ionization enthalpy than oxygen then carbon then Boron and then beryllium