An electron
Size: 10-18 m.
Each electron has a charge -1.
It has a small mass.
At the limit of current experiments, the electron still appears to be
a point particle.
The limit of current experiments is roughly 10-18 m, so
this program doesn't go beyond that.
Davison E. Soper, Institute of Theoretical Science,
University of Oregon, Eugene OR 97403 USA
soper@bovine.uoregon.edu