Question

______ are combinations of two or more ______, which are the fundamental units of matter. a) Molecules; atoms b) Molecules; electrons c) Atoms; molecules d) Atoms; protons

Answer 1

Molecules are combinations of two or more atoms. Atoms are fundamental units of matter, making up everything in the universe. An example is water, which is a molecule made up of two hydrogen atoms and one oxygen atom. Therefore the correct option is A.

Step-by-step explanation:

The correct answer to the question is a) Molecules; atoms. Molecules are combinations of two or more atoms. Atoms are the fundamental units of matter, as everything in the universe is composed of them. For example, water is a molecule formed by two hydrogen atoms and one oxygen atom.

Learn more about Molecules and Atoms