Also found in: Dictionary, Thesaurus, Encyclopedia.

(ah'vō-gahd'rō),

named after Amedeo Avogadro, an Italian physicist 1776-1856.

A's law
equal volumes of perfect gases at the same temperature and pressure contain the same number of molecules.
A's number, A's constant
the number of particles of the type specified by the chemical formula of a certain substance in 1 gram-molecule of the substance.
References in periodicals archive ?
El numero de Avogadro es una constante fundamental que relaciona la escala atomica de cualquier magnitud con la escala macroscopica (Becker, 2003; Peuto, 2002),
Segun Avogadro, era la demostracion de que todos los gases debian estar formados de particulas, en pleno acuerdo con la constitucion atomica de la materia; no solo, sino que se debia considerar, ademas, que: en iguales volumenes de gas, en las mismas condiciones de temperatura y presion, debia estar contenido un igual numero de particulas.
To solve this problem, Avogadro proposed that a distinction be drawn between molecules elementaires and molecules integrantes, a distinction which basically coincides with the contemporary one between 'atoms' and 'molecules' respectively.
After cleaning, repolishing and remeasuring silicon orbs used for previous measurements, a team of researchers reported a new value of the Avogadro constant in Metrologia in March.
Jack Lin and colleagues at the University of Wisconsin-Madison and Amedeo Avogadro University in Italy.
m] Volumen molar t Tiempo de flujo N Numero de Avogadro h Constante de Planck D Coeficientes D de viscosidad B Coeficientes B de viscosidad [rho] Densidad [DELTA][G.
Friedrich Wohler, Robert Bunsen, and Eduard Buchner of Germany, Lorenzo Avogadro of Italy, and Dmitri Mendeleev of Russia.
In 1811 an Italian physicist, Amedeo Avogadro (1776-1856), suggested that this might mean that all gases-at the same volume, pressure, and temperature-were made up of the same number of particles.
Rob Williams started his career at Microsoft, then co-founded and served as CTO at Avogadro, and then served in executive positions at Openwave and RealNetworks.
And while his grasp on mathematical history is thorough, physics fans may notice that in a chapter on a mathematical physics problem he stumbles on historical detail: He misstates the chronology of particle physics discoveries and attributes the explanation of atomic isotopes in 1911 to Amedeo Avogadro, who died in 1856.
Concentrations were converted to copies/[micro]L by use of the Avogadro constant and the molecular weight of each amplicon [number of bases of the PCR product multiplied by the mean molecular weight of a pair of nucleic acids which is 660 (12)].
A] is the Avogadro constant, and 1000 is the number of [cm.

Site: Follow: Share:
Open / Close