Problem: Why is CrO named using a Roman numeral, chromium(II) oxide, whereas CaO is named without a Roman numeral, calcium oxide?

FREE Expert Solution

Cr → transition metal → multiple possible charges

Ca → Group 2A → +2 charge


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Problem Details

Why is CrO named using a Roman numeral, chromium(II) oxide, whereas CaO is named without a Roman numeral, calcium oxide?

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