What are the formal charges of each atom in #ClO_4^-#?

1 Answer
Jul 26, 2016

Given a static resonance structure, all of the atoms are neutral, save ONE negatively charged oxygen.


A Lewis structure of #(O=)_3Cl-O^-# is feasible, which places the formal negative charge on oxygen. Of course the negative charged is distributed over all the oxygen centres by resonance. The chlorine atom owns 7 valence electrons, and is thus neutral.