H. Chem Unit 3

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Last updated 4:10 PM on 9/23/26
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4 Terms

1
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Proton

Charge: positive

Location: in nucleus

Mass: 1 amu (atomic mass unit), contributes to the mass of an atom

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Neutron

Charge: neutral, no charge

Location: in the nucleus

Mass: 1 amu, contributes to the mass of an atom

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Electron

Charge: negative

Location: outside of nucleus (orbitals or electron cloud)

Mass: negligible mass, does not contributes to mass of atom

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Isotopes

Atoms of the same element that have the same number of protons but a different number of neutrons

Means different mass numbers