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Moderate

Metal Oxide Formula

APCHEM-X8V4EL

Metal oxides are formed during the reaction between a metal cation and oxygen gas. Since transition metals can have two or more valence shell configurations, there can be more than one metal oxide formula for a given transition metal.

Based on this knowledge, which of the following is the correct formula for chromium (IV) oxide?

A

$Cr_2O$

B

$CrO_2$

C

$Cr_2O_4$

D

$Cr_4O_2$