Multiple Choice
Which of the following is the correct chemical formula for the ionic compound formed by calcium (Ca) and bromine (Br)?
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3. Chemical Reactions
Naming Ionic Compounds
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What is the correct name for the ionic compound formed from MnO?
A
Manganese dioxide
B
Manganese(II) oxide
C
Manganese(III) oxide
D
Manganese(I) oxide
Verified step by step guidance1
Identify the ions involved in the compound MnO. Mn is manganese, and O is oxygen, which typically forms the oxide ion O^{2-}.
Determine the charge on the oxide ion, which is -2, since oxygen in oxides usually has a charge of 2-.
Since the compound is neutral overall, the charge on the manganese ion must balance the -2 charge from oxygen. Therefore, manganese must have a +2 charge.
Use the Roman numeral system to indicate the oxidation state of manganese in the compound. Because manganese has a +2 charge here, it is named Manganese(II).
Combine the name of the metal with its oxidation state and the name of the nonmetal ion. The correct name for MnO is Manganese(II) oxide.
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