Cr(OH)_(2) A. chromium (II) hydroxide B. chromium (III)hydroxide C. chromium (III) oxide D. chromium (I) hydroxide A B D

The correct answer is A. chromium (II) hydroxide.<br /><br />In the compound $Cr(OH)_{2}$, the chromium ion has an oxidation state of +2, which is indicated by the Roman numeral II in the name chromium (II) hydroxide. The hydroxide ion (OH) has a charge of -1, and there are two of them in the compound, giving a total charge of -2. To balance this, the chromium ion must have a charge of +2. Therefore, the correct name for the compound is chromium (II) hydroxide.