Chapter 6, Problem 22P

For each of the following valence electron configurations of a homonuclear diatomic molecule or molecular ion, identify the element X, Q, or Z and determine the total bond order.

(a) $X_2:{\left({\sigma }_{g2s}\right)}^2{\left({\sigma }_u^{*}{}_{2s}\right)}^2{\left({\sigma }_{g2p_z}\right)}^2{\left({\pi }_{u2p}\right)}^4{\left({\pi }_g^{*}{}_{2p}\right)}^2$

(b) $Q_2^{-}:{\left({\sigma }_{g2s}\right)}^2{\left({\sigma }_u^{*}{}_{2s}\right)}^2{\left({\pi }_{u2p}\right)}^3$

(c) $Z_2^{2+}:{\left({\sigma }_{g2s}\right)}^2{\left({\sigma }_u^{*}{}_{2s}\right)}^2{\left({\sigma }_{g2p_z}\right)}^2{\left({\pi }_{u2p}\right)}^4{\left({\pi }_g^{*}{}_{2p}\right)}^2$