We’re being asked to name CaO. The rules for naming binary ionic compounds are as follows:
1. The metal keeps its name, and is named and written first.
– For transition metals, we use Roman numerals to denote its charge.
2. The nonmetal keeps its base name but has its ending change to –ide.
What is the name is the ionic compound CaO
1. calcium oxygen
2. calcium oxide
3. calcium (I) oxide
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