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Answered 2010-07-21 09:18:52

If a proton would be 1, an electron would be 0.000544. An electron is 1,836 times lighter than a proton. A neutron would be 1.001 as a proton is 99.86% the mass of a neutron

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The electron. It has an almost negligible mass relative to that of the proton and the neutron (which form the nucleus).


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