Name the following ionic compounds: (a) KCN (b) NaBrO₂ (c) Sr(OH)₂ (d) CoTe

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Identify the cation and the anion in the compound. Here, the cation is Na (sodium) and the anion is BrO2.

Recognize that Na is a Group 1 element, which means it forms a +1 charge as a cation, Na⁺.

Determine the anion BrO2. This is a polyatomic ion known as bromite, which typically carries a -1 charge.

Combine the names of the cation and the anion. The cation name (sodium) comes first, followed by the anion name (bromite).

The name of the compound is 'sodium bromite'.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Ionic Compounds

Ionic compounds are formed when atoms transfer electrons, resulting in the formation of positively charged cations and negatively charged anions. These oppositely charged ions attract each other, creating a stable compound. Understanding the structure and properties of ionic compounds is essential for naming them correctly.

Nomenclature of Ionic Compounds

The nomenclature of ionic compounds involves specific rules for naming the cations and anions. Typically, the cation is named first, followed by the anion. For polyatomic ions, such as bromite (BrO2-), it is important to recognize their names and charges to accurately name the compound.

Polyatomic Ions

Polyatomic ions are ions composed of two or more atoms covalently bonded together, which carry a net charge. In the case of NaBrO2, the bromite ion (BrO2-) is a polyatomic ion that must be identified correctly to name the compound. Familiarity with common polyatomic ions is crucial for proper nomenclature.

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