atom, the smallest unit of an element that maintains the chemical properties of that element, nucleus, the positively charged central core of an atom, consisting of protons and neutrons, electron, negatively charged particle, neutron, nuetral particle found in nucleus, proton, positiely charged particle found in nucleus, ion, atom with net electric charge, isotope, an atom that has the same number of protons but different number of neutrons, atomic mass, the number of protons, used to identify elements, mass number, number of protons and neutrons, average atomic mass, a weighted average of the masses of all of the isotopes of an element, percent abundance, the amount of an isotope that is naturally occurring, electron cloud, region around nucleus where electrons are found.

Atomic Structure

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