Question

chromium is a transition metal,and oxygen had an oxidation number of -2. use this information to match each compound to its chemical formula.

Answer 1

Answer:

$CrO->chromium-monoxide\\Cr_2O_3 -> dichromium-trioxide\\CrO_3 -> chromium-trioxide$

Explanation:

Hello,

Chromium has +2, +3 and +6 as the oxidation states, thus, each chromium oxide turns out into:

$CrO\\Cr_2O_3\\CrO_3$

Their names are hypochromous oxide or chromium monoxide, chromous oxide or dichromium trioxide and chromic oxide or chromium trioxide.

Best regards.