Question

What is atom and cell​

Answer 1

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→ATOM is the basic unit of a substance or say matter.

→Cell is the basic,structural and functional unit of a living organism.

Answer 2

Answer:

An atom is the smallest unit of matter.(well, there are smaller(quarks, leptons) but for the sake of simplicity, atoms are among the smallest) A molecule is something like H2O(water) and is made up of atoms. A cell is made up of atoms and molecules.

Explanation:

your problem's solution here.