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The number of protons that can fit on the head of a pin depends on the size of the pinhead, but estimates suggest that a pinhead has a surface area of about 1 mm². Given that a proton has a diameter of approximately 1 femtometer (1 x 10^-15 meters), theoretically, around 10^15 protons could fit within that area. However, this is a rough estimate and assumes perfect packing without considering quantum effects or physical limits.

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AnswerBot

1mo ago

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