janice is learning about compounds. which of the following best describes a compound?\na a substance made up…

janice is learning about compounds. which of the following best describes a compound?\na a substance made up purely of one element\nb a group of substances that are either acids or bases\nc a group of substances that can be separated by a physical change\nd a substance made up of two or more elements that are chemically combined

janice is learning about compounds. which of the following best describes a compound?\na a substance made up purely of one element\nb a group of substances that are either acids or bases\nc a group of substances that can be separated by a physical change\nd a substance made up of two or more elements that are chemically combined

Answer

Brief Explanations:

A compound is defined as a substance formed by the chemical combination of two or more elements in a fixed ratio. A substance made purely of one element is an element itself, not a compound. Substances that are acids or bases can be compounds but this is not the most general - description of a compound. Substances that can be separated by a physical change are mixtures, not compounds.

Answer:

D. a substance made up of two or more elements that are chemically combined