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    4. How big is a proton?
    How big is a proton?

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    0  Views: 363 Answers: 1 Posted: 14 years ago
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      The most recent estimates. . . . put the radius of the proton at around 0.8768 femtometres (1 femtometre = 10-15 metres).
      14 years ago. Rating: 0
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