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Hi there!

Three things that make up an atom are electrons, protons, and neutrons.

Electrons orbit the atom.
Protons and neutrons are found in the nucleus.

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THEBRAINLY1
An atom [ Neutral atom ] is uniformly composed of 3 basic quantum particles , called electron , neutron and proton

Proton and neutron altogether make up a nucleon , and electron revolves around the nucleonic system with very higher velocity

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