Predict whether or not a Mg2 molecule is stable.

a. Mg2 is stable with a bond order of 2b. Mg2 is stable with a bond order of 0.5c. Mg2 is stable with a bond order of 1d. Mg2 is not stable

I think the correct answer from the choices listed above is the last option. An Mg2 molecule is not stable because the charge for this molecule cannot be balanced which means it is not in equilibrium. Hope this answers the question. Have a nice day.