question 3 (0.25 points) give the name of the polyatomic ion. do not in…

question 3 (0.25 points) give the name of the polyatomic ion. do not include the word \ion\. $cr_{2}o_{7}^{2 - }$

Brief Explanations

The polyatomic ion $Cr_{2}O_{7}^{2 - }$ is well - known in chemistry as dichromate.

dichromate