Avogadro
Crazy scientist who came up with "Avogadro's Constant", a number that clumps a specific number of atoms into a mole, which can be used to figure out the exact weight of an atom of any element. On the periodic table, the element's atomic mass is in grams per mole. There are 6.02 X 10^23 atoms in one mole.
Get the Avogadro mug.