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what is the smallest unit of matter it is composed of protons and neutrons held together in a nucleus and electrons around the nucleus in different electrons orbitals which form an electron cloud?

a.atom b.cell c.electron d.nucleus​


Sagot :

Answer:

Atom

Explanation:

It is the smallest unit which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element. As such, the atom is the basic building block of chemistry.