Full name: atom
Plural form: atoms
Category type: amount of substance
Scale factor: 1.66053886313E-24
The SI base unit for amount of substance is the mole.
1 mole is equal to 6.0221415E+23 atom.
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This site uses an exact value of 6.0221415 x 1023 for Avogadro's number. This is the number of atoms in 1 mole of a chemical element.