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The number of protons in the nucleus of the atom is equal to the atomic number (Z)
The number of electrons in a neutral atom is equal to the number of protons.
The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons
The atomic number of a chemical element is the number of protons found in the nucleus of an atom of that element
If you know the mass number and atomic number of the atom, the number of neutrons is just the difference between them.
Protons are positively charged atoms. Electrons are negatively charged atoms. Neutrons has no charge
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