Chapter 14, Problem 50E

Consider the following electron configuration:

${{\text{(σ}}_{\text{3s}}\text{)}}^{\text{2}}{{\text{(σ}}_{\text{3s}}\text{*)}}^{\text{2}}{{\text{(σ}}_{\text{3p}}\text{)}}^{\text{2}}{{\text{(π}}_{\text{3p}}\text{)}}^{\text{4}}{{\text{(π}}_{\text{3p}}\text{*)}}^{\text{4}}$

Give four species that, in theory, would have this electron configuration.