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Chem: Configuration Review

AB
subatomic particle that contributes the least to the mass of an atomelectron
the mass of a proton1
the charge of a proton1+
the number of protons in the nucleus of 15P3215
the mass number of an ion that consists of 20 protons, 20 neutrons, and 18 electrons40
mass number of an atom is equal toprotons plus neutrons
has a mass 1/1837 of the mass of a protonelectron
a Na atom has more of these than a Na+ ionelectrons
number of protons in an OH- ion9
maximum number of electrons in the 3rd energy level18


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