Atomic Theory

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Physical Science

8th

Last updated 9:30 PM on 1/4/23

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1

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Proton

positively charged particle

2

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Neutron

no charge

3

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Electron

negatively charged particle

4

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Nucleus

Center of an atom

5

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atomic mass

Number of protons and neutrons

6

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atomic number

the number of protons in the nucleus of an atom

7

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isotopes

Atoms with the same number of protons but different numbers of neutrons