Question

what is the name of cro4^2-? dichromate ion chromate ion chromium tetroxide ion chromium oxide ion

Explanation:

The dichromate ion is \(Cr_2O_7^{2 -}\), the chromate ion is \(CrO_4^{2 -}\), chromium tetroxide is \(CrO_4\) (not an ion), and chromium oxide has formulas like \(CrO\) or \(Cr_2O_3\) (not the given ion).

Answer:

chromate ion