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The '''Avogadro constant''' (<math> N_A</math>) in [http://physics.nist.gov/cuu/Units/ Le Système international d'unités] is given by | The '''Avogadro constant''' (<math> N_A</math>) in [http://physics.nist.gov/cuu/Units/ Le Système international d'unités] is given by (Ref. 1): | ||
:N<sub>A</sub> = 6.02214129 x 10<sup>23</sup> mol<sup>-1</sup> | :N<sub>A</sub> = 6.02214129 x 10<sup>23</sup> mol<sup>-1</sup> | ||
==History== | ==History== | ||
The first person to try elucidate an analogous value was [[ Johann Josef Loschmidt]] in 1866 | The first person to try elucidate an analogous value was [[ Johann Josef Loschmidt]] in 1866 (Ref. 2). | ||
However, this constant was named after Lorenzo Romano Amedeo Carlo Avogadro by Jean Perrin in 1909 | However, this constant was named after Lorenzo Romano Amedeo Carlo Avogadro by Jean Perrin in 1909 (Ref. 3). | ||
== | ==Interesting reading== | ||
*[http://dx.doi.org/10.1038/179145a0 F. A. Paneth "Avogadro's Number and Loschmidt's Number", Nature '''179''' p. 145 (1957)] | *[http://dx.doi.org/10.1038/179145a0 F. A. Paneth "Avogadro's Number and Loschmidt's Number", Nature '''179''' p. 145 (1957)] | ||
*[http://dx.doi.org/10.1119/1.2188962 Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner "Einstein, Perrin, and the reality of atoms: 1905 revisited", American Journal of Physics '''74''' pp. 478-481 (2006)] | *[http://dx.doi.org/10.1119/1.2188962 Ronald Newburgh, Joseph Peidle and Wolfgang Rueckner "Einstein, Perrin, and the reality of atoms: 1905 revisited", American Journal of Physics '''74''' pp. 478-481 (2006)] | ||
==References== | |||
#[http://physics.nist.gov/cgi-bin/cuu/Value?na#mid CODATA] | |||
#J. Loschmidt "Zur Grösse der Luftmolecüle", Sitzungsberichte der kaiserlichen Akademie der Wissenschaften zu Wien: Math-Naturwiss., Klasse 2, '''52''' pp. 395–413 (1866) | |||
#Jean Perrin "Mouvement brownien et réalité moléculaire", Annales de chimie et de physique '''XVIII''' (8e série) pp. 5-113 (1909) [http://gallica.bnf.fr/ark:/12148/bpt6k349481/ Page images on Gallica] | |||
#[http://dx.doi.org/10.1007/BF02743188 G. Mana and G. Zosi "The Avogadro constant", La Rivista del Nuovo Cimento '''18''' pp. 1-23 (1995)] | |||
[[Category: Physical constants]] | [[Category: Physical constants]] | ||