Question

define atom and molecule​

Answer 1

A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.

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Answer 2

Atom -The smallest particle of an element which takes part in chemical reactions.

Molecule-The smallest particle of a compound which can exist at its own and shows all the properties.