Chem atomic particles

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Last updated 9:42 PM on 9/7/26

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1

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Proton

+1 charge; located in the nucleus

2

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Neutron

0 charge; located in the nucleus

3

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Electron

−1 charge; located outside the nucleus

4

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Atomic number

Number of protons

5

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Mass number

Number of protons + neutrons

6

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Neutral atom

Has equal numbers of protons and electrons