Chemistry

Question Analysis
This question involves classifying compounds based on bond type.

Key Concept Explanation
Ionic compounds typically form between a metal and a nonmetal. Metals tend to lose electrons to form positive ions, while nonmetals gain electrons to form negative ions. The resulting electrostatic attraction between oppositely charged ions creates an ionic compound.

Option Analysis
1. Identify the elements in each compound:

A. CaF₂ → calcium (metal) + fluorine (nonmetal)

B. NH₃ → nitrogen + hydrogen (both nonmetals)

C. CH₄ → carbon +...