proton的weight是...
The weight of 1 proton is 1.67 yoctograms. That is ...
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almost the same as neutron (0.99 to be exact).
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1,835 times bigger than electronic .
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463,888,889 times bigger than electronic neutrino .
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19 times smaller than water molecule .
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59 times smaller than iron atom .
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82 times smaller than copper atom .
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697 times smaller than uranium atom .
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996,752,695 times smaller than influenza virus .
