*2 for $13* Avogadro's Number Mole Formula Fun Chemistry Pin

Avogadro's number, or Avogadro's constant, is the number of particles found in one mole of a substance. It is the number of atoms in exactly 12 grams of carbon-12. This experimentally determined value is approximately 6.0221 x 1023 particles per mole.  New in packaging. Such a fun pin for science lovers, or students. These are great on jackets, lanyards, ita bags.