Correct each of the following formulas: (a) Barium oxide is BaO2. (b) Iron(II) nitrate is Fe(NO3

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Correct each of the following formulas: (a) Barium oxide is...

Correct each of the following formulas:
(a) Barium oxide is $\mathrm{BaO}_{2}$.
(b) Iron(II) nitrate is $\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}$
(c) Magnesium sulfide is $\mathrm{MnSO}_{3}$.
(d) Potassium iodide is $\mathrm{P}_{2} \mathrm{I}_{3}$.

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Key Concepts

Polyatomic Ions

Polyatomic ions are groups of atoms that behave as a single charged entity. Recognizing common polyatomic ions and their typical charges is crucial when writing chemical formulas, as it ensures that these groups are used correctly with appropriate subscripts to maintain charge neutrality.

Oxidation States and Chemical Nomenclature

Chemical nomenclature often includes oxidation states to specify the charge on a particular element, especially transition metals. The oxidation state guides the formation of the compound by indicating the number of electrons lost or gained, which in turn affects the compound's formula.

Charge Neutrality Principle

In ionic compounds, the total positive charge from the cations must balance the total negative charge from the anions. This principle is used to determine the proper subscripts in chemical formulas, ensuring that the overall compound is electrically neutral.

Ionic Compounds and Formula Writing

Understanding how to write formulas for ionic compounds involves identifying the ions present and then combining them in a ratio that balances their charges. This process requires knowledge of common ion charges and how to correctly represent them using subscripts.

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