mention the properties of particles in a atom
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Protons, neutrons, and electrons are known from chemistry. Atoms are all made up of a cloud of electrons around a positively-charged nucleus consisting of protons and neutrons. ... In the table, the mass unit is 1.67 x 10 -27 kilograms, the charge unit is 1.60 x 10 -19 Coulombs, and I have chosen arbitrary names
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