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

Explanation:

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

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

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what does the table look like

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.