Physics Van 3-site Navigational Menu

Physics Van Navigational Menu

Q & A: Atoms on a Pin Head

Learn more physics!

Q:
how many atom can fit on the head of a pin?
- bev
elementary, salt lake city ut usa
A:
According to:
http://www.4chemistry.co.uk/L5th-atom-notes1.htm

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.

Check this out:
http://www.monroecc.edu/wusers/flanzafame/PerRadii.pdf
(You'll need Adobe Acrobat to read it)

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.

Jason

(republished on 07/17/06)

Follow-up on this answer.