Final answer:
Type II binary ionic compounds are named by indicating the metal's cation charge with a Roman numeral. Thus, FeCl₂ is iron(II) chloride, FeCl₃ is iron(III) chloride, and Hg₂Cl₂ is mercury(I) chloride.
Step-by-step explanation:
When naming Type II binary ionic compounds, it is crucial to determine the charge on the cation which can have more than one possible charge. The name is then composed of the name of the cation (the metal), followed by a Roman numeral in parentheses to indicate its charge, and finished with the base name of the anion (the nonmetal) with an '-ide' suffix. Therefore, the names for the compounds given are as follows:
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- FeCl₂ - iron(II) chloride, also known as ferrous chloride.
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- FeCl₃ - iron(III) chloride, also known as ferric chloride.
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- Hg₂Cl₂ - mercury(I) chloride, also known as mercurous chloride.
It is essential to note that the compound Hg₂Cl₂ contains a dimeric cation (Hg₂2+) and is named in a slightly different way compared to FeCl₂ and FeCl₃, reflecting the unique nature of mercury cations.