Avogadro constant

The Avogadro constant (Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle N_A} ) in Le Système international d'unités is given by:

N_A = 6.02214179(30) x 10²³ mol^-1

It is named after Lorenzo Romano Amedeo Carlo Avogadro by Jean Perrin in 1909 (Ref. 3).

References

1. CODATA
2. G. Mana and G. Zosi "The Avogadro constant", La Rivista del Nuovo Cimento 18 pp. 1-23 (1995)
3. Jean Perrin "Mouvement brownien et réalité moléculaire", Annales de chimie et de physique XVIII (8e série) pp. 5-113 (1909) Page images on Gallica