acetylene (c2h2) has a tendency to lose two protons (h ) and form the carbide ion (c2 2- ), which is present in a number of ionic compounds such as cac2 and mgc2. given on the right is the ordering of the molecular orbital energies for c2. a) fill in the valence electrons of the carbide ion into the given diagram in order to create the molecular orbital diagram for the carbide ion in its ground state. b) what is the bond order of c2 2- based on your diagram? bond order of c2 2- : 3 c) looking at your mo diagram, is the c2 2- molecule diamagnetic or paramagnetic?