State the basic unit of matter

The atom

Explanation:

The basic unit of matter is the "atom." All matter consists of millions of atoms that within the atom contains electrons, protons, and neutrons. Knowing how many electrons, protons, and neutrons a atom has can determine the element  which are substances that are on the periodic table.

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atom

Explanation:it comprises a nucleus (neutrons +protons) that is sourounded by a cloud of electrons

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