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by Brian on July 19th, 2008
According to http://hypertextbook.com/facts/2000/DannyDonohue.shtml and http://en.wikipedia.org/wiki/Classical_electron_radius , the radius of an electron is 10^-15 meters, i.e. 1 femto-meter, or 1 quadrillionth of a meter.
According to http://home.att.net/~numericana/answer/units.htm , the smallest nominal measurement would be expressed as a yocto-<unit>, i.e. 10^-24 or 1 septillionth.
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Comments
Fascinating! Thank you so much! +6
by Mrs.Dufresne on July 19th, 2008
My pleasure!
As far as I know, the electron is the smallest unit of measurable matter.
by Brian on July 19th, 2008