Definition: | fundamental physical constant equal to the number N of elementary entities in a given sample of matter, divided by the amount of substance n of that sample NA=N/n Note 1 to entry: The value of the Avogadro constant is 6,022 141 29(27) × 1023 mol–1 (CODATA 2010). Note 2 to entry: The term “Avogadro number” is deprecated because a number has dimension 1.
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