A mole is the amount of a substance that contains the same number of [[molecule]]s or other [[element]]ary units as the number of atoms in 0.012 kilogram of [[carbon]] 12. Just as a dozen always contains twelve items, a Mole always contains <math>6.02 x 10^{23}</math> molecules or atoms.
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A '''mole''' is the amount of a substance that contains the same number of [[molecule]]s or other [[element]]ary units as the number of atoms in 0.012 kilograms (12 grams) of [[carbon]] 12. Just as a dozen always contains twelve items, a Mole always contains <math>6.02 x 10^{23}</math> molecules or atoms.