The size of isoelectronic species ${\mathrm{F}}^{-}$, $\mathrm{Ne}$ and ${\mathrm{Na}}^{+}$ is affected by

Which one of the following statements is incorrect in relation to ionization enthalpy?

Considering the elements $\mathrm{B}, \mathrm{Al}, \mathrm{Mg},$ and $\mathrm{K}$, the correct order of their metallic character is:

Considering the elements $\mathrm{F}, \mathrm{Cl}, \mathrm{O} \mathrm{and} \mathrm{N},$ the correct order of their chemical reactivity in terms of oxidising property is: