PhySci Ch6

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the sum of the protons and neutrons in the nucleus of an atom; also known as atomic mass

a neutral particle in the nucleus of an atom, with approximately the same mass as a proton

the center of an atom, which contains protons and neutrons

the number of protons in the nucleus of an atom

the splitting of a nucleus

a negatively charged particle with an extremely small mass

different forms of the same element that have different numbers of neutrons

regions of most probable location of electrons