which particles determine the mass of an atom
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proton and neutron determine the mass of an atom
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The mass is protons and neutrons present in a atom is only considered as the mass of an atom, because the electrons present in it has very less mass as compared to that of proton and hence it is not considered while calculation Atomic mass.
Mass of a Electron = (1/1849) times of proton
Atomic mass = mass of neutron+ mass of proton.
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Mass of a Electron = (1/1849) times of proton
Atomic mass = mass of neutron+ mass of proton.
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