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11 January, 06:43

Which total mass is the smallest?

(1) the mass of 2 electrons

(2) the mass of 2 neutrons

(3) the mass of 1 electron plus the mass of 1 proton

(4) the mass of 1 neutron plus the mass of 1 electron

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Answers (1)
  1. 11 January, 07:21
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    The mass of electrons, protons, and neutrons:

    electrons 9.10938291*10^-31 kg

    protons 1.67262178*10^-27 kg

    neutrons 1.6749*10^-27 kg

    the mass of electrons is way smaller than both, the mass of protons and neutrons

    therefore, 1) the mass of 2 electrons is the smallest
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