Question

what is the correct name for the compound mno?
manganese dioxide
manganese (ii) oxide
manganese (iv) oxide
manganese oxide

Explanation:

• For ionic compounds with transition metals (like Mn), we need to indicate the oxidation state of the metal in Roman numerals.
• In \(MnO_2\), oxygen has an oxidation state of \(- 2\). Let the oxidation state of Mn be \(x\). Using the rule that the sum of oxidation states in a neutral compound is \(0\): \(x+2\times(-2) = 0\). Solving for \(x\): \(x-4 = 0\), so \(x = +4\).
• The name of the compound is based on the metal (manganese), its oxidation state (IV) in parentheses, and the non - metal (oxide).

Answer:

Manganese (IV) oxide