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ⓘ Avogadro constant. The Avogadro constant is the number of particles in one mole of a given substance. Its value is equal to 6.022 141 29 × 10 23 mol −1. The con ..




Avogadro constant
                                     

ⓘ Avogadro constant

The Avogadro constant is the number of particles in one mole of a given substance. Its value is equal to 6.022 141 29 × 10 23 mol −1. The constant was named after the Italian scientist Amedeo Avogadro.

The measurement of Avogadros constant was refined in 2011 to 6.02214078 × 10 23 ± 0.00000018 × 10 23.

An old term closely related to the Avogadro constant is Avogadros number. Avogadros number is the number of atoms in 12 grams of the carbon isotope carbon-12. Avogadros number is a dimensionless quantity and has the numerical value of the Avogadro constant given in base units.