Decreasing bond length

[annemarielawrence]

Hi, can someone explain to me how to determine decreasing bond lengths for the species, F2+, F2, F2-, and F22-?

[Nancy_La_1H]

Due to the different charges in F2+, F2, F2-, and F22-, the number of electron you have to work with will differ. So when you draw the lewis structure for each molecule, you will find that they use different bond(single v double v triple bonds). As the number of single bond decreases so do the bond length. In term of length the order goes (longest) single bond > double bond > triple bond (shortest).

[605778346]

We can determine bond length by the number of bonded electrons. The bond lengths go from single bonds>double bonds> triple bonds.

[Narin Maisha 2H]

To find bond length you first need to determine the bonds used. First try drawing out the molecule, and through that you will be able to recognize whether it uses single, double, or triple bonds. Once you get that you can find the length but understanding that the order of the bonds from longest to shortest is single, double, then triple.