Question

what describes a compound? a a mixture of elements. b a single type of atom. c a liquid that cannot dissolve. d a substance made up of two or more elements chemically bonded together.

Explanation:

To determine the correct option for describing a compound, we analyze each choice:

• Option A: A mixture of elements is incorrect because a compound is a pure substance, not a mixture. Mixtures have components that are not chemically bonded.
• Option B: A single type of atom describes an element, not a compound. Compounds are made of multiple elements.
• Option C: A liquid that cannot dissolve is describing an insoluble liquid, which has nothing to do with the definition of a compound.
• Option D: A compound is defined as a substance made up of two or more elements that are chemically bonded together. This matches the definition of a compound.

Answer:

D. A substance made up of two or more elements chemically bonded together.