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| abstraction > mathematical concept > number > constant > fundamental physical constant > physico chemical constant > Avogadro number | 
| Avogadro number (NA)  | ||||
| subject | fact | |||
| Avogadro number | has symbol NA | ![]()  | 
| has value 6.02214199 × 1023 mol-1 | ![]()  | |
| has uncertainty 0.00000047 × 1023 mol-1 | ![]()  | |
| is named after Amadeo Avogadro | ![]()  | |
| has definition The number of atoms in 12 grams of carbon 12. The number of atoms in a gram-atom (mass in grams numerically equal to the atomic weight) or the number of molecules in a gram-molecule (mass in grams numerically equal to the molecular weight). | ![]()  | |
| is an instance of physico chemical constant | ![]()  | |
| fundamental physical constant | has accuracy | ![]()  | 
| has unit | ![]()  |