C = Color: Moles that includes two to a few unique shades of brown need to be looked at a little suspiciously. Moles colored blue, gray, crimson, black or white also may possibly sign probable melanoma.
A mole of C-12 by definition weighs specifically 12 g and Avogadro's quantity is decided by counting the mole number of atoms. It's not so easy. Avogadro's selection is the elemental regular that's minimum accurately identified.