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Last update:
9/30/03; 2:51:56 AM

p e r i o d i c
a table of the elements


 Tuesday, July 8, 2003


An astute reader noticed that positions within the isotope table where there was no isotope for the mass number were not shown, causing many elements to be misaligned. This has now been corrected, so the isotope table can be used to do particle math.

For example, I just bought a needle with a bit of polonium 210 in the eye, for the cloud chamber. Polonium 210 is a radioactive isotope that emits an alpha particle to become lead 206. An alpha particle is composed of two protons and two neutrons, identical to a helium nucleus. The diagram shows how the isotope table works.
  10:51:01 AM   comments