Mass Number, Total number of protons and neutrons in an atom, Atomic Number, Indicates the number of protons in an atom, Protons, A positive subatomic particle with 1 amu,located inside the nucleus, Electrons, A negative subatomic particle with less than 1amu, located outside the nucleus , Nucleus, Located at the center of an atom and contains neutrons and protons, Electron Cloud, area that surrounds the nucleus and has electrons, Neutrons, A neutral subatomic particle with 1 amu ,located inside the nucleus, Atom, Tiny particles that make up all matter. Composed of nucleus and electron cloud.

Atom Structure

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