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Amedeo Avogadro

Amedeo Avogadro
Amedeo Avogadro, Italian physicist and chemist (d. 1856)

Lorenzo Romano Amedeo Carlo Avogadro, Count of Quaregna and Cerreto (, also, Italian: [ameˈdɛːo avoˈɡaːdro]; 9 August 1776 – 9 July 1856) was an Italian scientist, most noted for his contribution to molecular theory now known as Avogadro's law, which states that equal volumes of gases under the same conditions of temperature and pressure will contain equal numbers of molecules. In tribute to him, the ratio of the number of elementary entities (atoms, molecules, ions or other particles) in a substance to its amount of substance (the latter having the unit mole), 6.02214076×1023 mol−1, is known as the Avogadro constant. This constant is denoted NA, and is one of the seven defining constants of the SI.

9 August 1776

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Born on the same birth day (9 August): Anna Kendrick • Bob Cousy • Butch Warren • Calie Pistorius • Chuck Essegian • Daniel Preussner • Jean Tirole • Jonathan Kellerman • Kirill Reznik • Matt Morris (baseball) • P. L. Travers • Sanya Lopez • Vinny Del Negro • Whitney Houston

Born in the same month (August 1776): Thomas Bladen Capel