The activity series shows that solid chromium will be oxidized to form

A. chromium 3 + ion

B. chromate ion

C. nothing

D. chrome

A. chromium 3 + ion

Explanation:

The activity series shows that chromium will be oxidized to chromium 3 + ions. This series shows the reactivity of each metal relative to one another.

It is used to predict the activity of metals.

From the series, chromium like most metal will favor an oxidation reaction;

Cr ⇄ Cr³⁺ + 3e⁻

The more oxidized metals are located at the top of the series.