In ${\mathrm{O}}_2^{-},{\mathrm{O}}_2$ and ${\mathrm{O}}_2^{2-}$ molecular species, the total number of antibonding electrons respectively are

Number of electrons in ${\mathrm{O}}_2^{-}$ is 17. Molecular orbital electronic configuration of ${\mathrm{O}}_2^{-}$ is:

$\left(\mathrm{\sigma }1{\mathrm{s}}^2\right)\left(\mathrm{\sigma }*1{\mathrm{s}}^2\right)\left(\mathrm{\sigma }2{\mathrm{s}}^2\right)\left(\mathrm{\sigma }*2{\mathrm{s}}^2\right)\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}^2\right)\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{x}}^2=\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\right)\left(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}}^2=\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^1\right)$

Number of anti-bonding electrons is 7 and number of bonding electrons is 10.

Number of electrons in O₂ is 16. Molecular orbital electronic configuration of O₂ is:

$\left(\mathrm{\sigma }1{\mathrm{s}}^2\right)\left(\mathrm{\sigma }*1{\mathrm{s}}^2\right)\left(\mathrm{\sigma }2{\mathrm{s}}^2\right)\left(\mathrm{\sigma }*2{\mathrm{s}}^2\right)\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}^2\right)\left(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2=\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\right)\left(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^1=\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^1\right)$

Number of bonding electrons in O₂ is 10 and number of anti-bonding electrons in O₂ is 6.

Number of electrons in ${\mathrm{O}}_2^{2-}$ is 18. Molecular orbital electronic configuration of ${\mathrm{O}}_2^{2-}$is:

$\left(\mathrm{\sigma }1{\mathrm{s}}^2\right)(\mathrm{\sigma }*1{\mathrm{s}}^2)\left(\mathrm{\sigma }2{\mathrm{s}}^2\right)(\mathrm{\sigma }*2{\mathrm{s}}^2)\left(\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{z}}^2\right)(\mathrm{\pi }2{\mathrm{p}}_{\mathrm{x}}^2=\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2)(\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{x}}^2=\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^2)$

Number of bonding electrons in ${\mathrm{O}}_2^{2-}$is 10 and number of anti-bonding electrons in ${\mathrm{O}}_2^{2-}$is 8.