Multiple choice Which of the following have two unpaired electrons in antibonding molecular orbitals? NO C<sub style="font-family:">2<sup style="font-family:"> O<sub style="font-family:">2 N<sub style="font-family:">2 F<sub style="font-family:">2 Reveal answer Fill a bubble to check yourself E Correct answer Explanation F2 (18 e-) : σ1s2 ϭ*1s2 ϭ2s2 ϭ*2s2 ϭ2pz2 π2px2 π2py2 ϭ*2pz2 π*2px1 π*2py1 Two unpaired electrons in antibonding molecular orbitals.