Final answer:
To name binary ionic compounds Type I, name the metal cation first followed by the nonmetal anion with '-ide.' The compounds KCl, ZnS, and Ba₃P₂ are named as potassium chloride, zinc sulfide, and barium phosphide, respectively.
Step-by-step explanation:
To name binary ionic compounds Type I, which contain a metal that forms only one type of cation, you follow a specific rule: the metal cation is named first, followed by the nonmetal anion with its ending changed to '-ide.' Here are the names for the compounds listed:
- KCl - Potassium chloride
- ZnS - Zinc sulfide
- Ba₃P₂ - Barium phosphide
These compounds consist of monatomic metal cations and monatomic nonmetal anions, and they do not require Roman numerals in their names because the metals form only one type of ion.