This chapter has been devoted to the chemical bonds produced by electron sharing. We have seen that, unless the bonded atoms have exactly the same electronegativity, sharing between atoms is never equal. Most bonds have a certain element of electron donation, or a certain ionic character, which can be calculated from dipole moments of molecules. The series of bonds of C, N, O, and F with H shows the kind of changes in percent ionic character that we would expect from their electronegativities. ( See table on the right )