Question

this image shows a model of an ammonia molecule. ammonia has one nitrogen atom (blue) chemically bonded to three hydrogen atoms (gray). is ammonia a compound? no yes

Explanation:

A compound is a substance made up of two or more different types of atoms chemically bonded together. Ammonia ($NH_3$) has one nitrogen atom and three hydrogen atoms chemically bonded, so it meets the definition of a compound.

Answer:

yes