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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43 times smaller than water molecule .
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49 times smaller than titanium atom .
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60 times smaller than iron atom .
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73 times smaller than copper atom .
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951 times smaller than uranium atom .
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7,638,595,437 times smaller than influenza virus .
