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Question
Give the charge and the mass of an electron, proton and neutron present in an atom ?
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Solution
| Particle | Charges | Mass |
| (1) proton | Positive | One atomic mass unit. (amu) |
| (2)electron | Negative | 1/1837 times the mass of one hydrogen atom. |
| (3)Neutron | No charge | One atomic mass unit, equal to mass of proton. |
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