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Chemistry, 18.12.2020 17:00 blueheeter1461

When writing the name for a compound containing a transition metal, a roman numeral is placed in between the two elements. What does the roman numeral signify?
a. The number of protons in the transition metal
b. The number transition metal atoms in the compound
c. The number of the non metal atoms in the compound
d. The oxidation number of the transition metal

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