Stability of species Li2 , Li2^- and Li2^+ increases in the order of (a) Li2 < Li2^+ < Li2^- (b) Li2^- < Li2^+ < Li2 (c) Li2 < Li2^- < Li2^+ (d) Li2^- < Li2< Li2^+ Li2^- and Li2^+ increases in the order of (a) Li2 < Li2^+ < Li2^- (b) Li2^- < Li2^+ < [...]