For Li, B, and F they only formed single bond between each other. For oxygen, O, it formed double bond. For N, it formed triple bond between the molecule. So, N2 got the largest bond dissociation energy, becauseof having most bond between molecule. Bond order of 2: O2 Solution For Li, B, and F they only formed single bond between each other. For oxygen, O, it formed double bond. For N, it formed triple bond between the molecule. So, N2 got the largest bond dissociation energy, becauseof having most bond between molecule. Bond order of 2: O2.