Question

match the vocabulary word to its definition. smallest unit of a chemical element a. mass b. atom amount of matter in an object c. matter anything that has mass and takes up space

Explanation:

The smallest unit of a chemical element is an atom. The amount of matter in an object is mass. Anything that has mass and takes up space is matter.

Answer:

smallest unit of a chemical element - b. atom
amount of matter in an object - a. mass
anything that has mass and takes up space - c. matter