Protons are massive particles with unit positive electric charge; neutrons are massive particles with NO electric charge. Together these constitute MOST (>99.9%) of the mass of the atom.
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Protons are massive particles with unit positive electric charge; neutrons are massive particles with NO electric charge. Together these constitute MOST (>99.9%) of the mass of the atom.
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Protons,together with electrically neutral particles called neutrons,make up all atomic nuclei except for the hydrogen nucleus (which consists of a single proton).
because every nucleus of a given chemical element has the same number of protons.
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