Give the chemical formula for (e) permanganate ion.

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Identify the name of the ion: permanganate.

Recall that permanganate is a polyatomic ion.

Understand that the permanganate ion contains manganese (Mn) and oxygen (O).

The permanganate ion has a chemical formula of \( \text{MnO}_4^- \).

Note that the permanganate ion carries a -1 charge.

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주요 개념

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Ionic Compounds

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of charged ions. These ions are held together by electrostatic forces in a lattice structure. Understanding ionic compounds is essential for recognizing how ions like permanganate interact with other substances in chemical reactions.

Polyatomic Ions

Polyatomic ions are ions composed of two or more atoms covalently bonded together, which carry a net charge. The permanganate ion (MnO4-) is a common example, consisting of one manganese atom and four oxygen atoms. Recognizing the structure and charge of polyatomic ions is crucial for writing correct chemical formulas.

Oxidation States

Oxidation states indicate the degree of oxidation of an atom in a compound, reflecting the number of electrons lost or gained. In the permanganate ion, manganese typically has an oxidation state of +7, which is important for understanding its reactivity and role in redox reactions. Mastery of oxidation states is vital for predicting the behavior of ions in chemical equations.