Question

what are atoms and molecules​

Answer 1

Explanation:

Atoms are defined as “the basic building blocks of matter”. It is the smallest constituent unit of matter that posses the properties of the chemical element. ... Molecules consist of one or more atoms bound together by covalent (chemical) bonds.

Answer 2

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid and gas compose atoms whereas a Molecule is a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.