Metals naming single-cation metal compounds

Naming Compounds Involving Single-Cation Metals... 

The rules for naming binary ionic compounds with single-cation metals are as follows ... 

Each category of metals requires a different scheme for naming their compounds. You start by learning to name ionic compounds involving metals that only form only a single cation. 

Naming binary ionic compounds in which the metal forms only a single cation is not difficult. 

Ionic compounds that contain polyatomic ions are named in the same way used to name binary ionic compounds. Attention must be paid as to whether the cation is a metal that forms a single cation or multiple cations, and the name of the polyatomic ion is that given in the table. Note how these six ionic compounds are named ... 

In the binary ionic compounds considered earlier (Type I), the metal present forms only a single type of cation. That is, sodium forms only Na, calcium forms only Ca, and so on. However, as we will see in more detail later in the text, there are many metals that form more than one type of positive ion and thus form more than one type of ionic compound with a given anion. For example, the compound FeCl2 contains Fe ions, and the compound FeCl3 contains Fe ions. In a case such as this, the charge on the metal ion must be specified. The systematic names for these two iron compounds are iron(ll) chloride and iron(lll) chloride, respectively, where the Roman numeral indicates the charge of the cation. 

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