Predict how the bond dissociation enthalpy and bond length will change if an electron is removed from Li2(g) molecule to form the Li2+ (g) ion.
One electron will be removed from the bonding pair right? So the electron left (not the 1s2 electrons) will be more strongly attracted to the side with less shielding and as a result (like difference in electronegativity maybe?), the bond length will increase. From this, I can say the bond dissociation enthalpy will decrease.
I know there's some wrong Chemistry in what I say, but is it a potential explanation, at least?