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Q & A: Atoms on a Pin Head

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how many atom can fit on the head of a pin?
- bev
elementary, salt lake city ut usa
According to:

About five million million hydrogen atoms could fit. Some factors would affect that number like the area of the head and the size of atoms (as well as attractions between atoms). Some atoms are larger than others.

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As atomic radii increases, you'll fit less and less atoms on the pin of an atom. The atomic radii is the average distance between the nucleus and the outermost electron.


(republished on 07/17/06)

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