Examine the structure of the dichromate ion (). Which statement regarding its geometry and bond leng — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Dichromate consists of two tetrahedral $CrO_4$ units sharing a corner oxygen. Resonance equalizes the 6 outer terminal bonds (giving them double-bond character, $\approx 163\text{ pm}$). The 2 inner bridging bonds are single bonds ($\approx 179\text{ pm}$).