The total number of antibonding electrons in nitrogen and oxygen molecules respectively is

${\mathrm{N}}_2\left(14{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2$

${\mathrm{O}}_2\left(16{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^1\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^1$

Total no. of antibonding electrons in nitrogen=4

Total no. of antibonding electrons in oxygen=6