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Avogadro's number
Avogadro's numbern. The number of items in a mole, approximately 6.0221 × 1023. Also called Avogadro constant.
[After Amedeo Avogadro.]A′voga′dro's num′ber
n. the constant, 6.02 x 1023, representing the number of atoms in a gram atom or the number of molecules in a gram molecule. Symbol: N Also called A′voga′dro con`stant. [1925–30; after A. Avogadro] Avogadro's number The number of atoms or molecules in a mole of a substance, approximately 6.0225 × 1023. See more at mole3.Thesaurus| Noun | 1. | Avogadro's number - the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)Avogadro numberconstant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant" |
Avogadro's number
Avogadro's number (ävōgä`drō) [for Amedeo AvogadroAvogadro, Amedeo, conte di Quaregna
, 1776–1856, Italian physicist, b. Turin. He became professor of physics at the Univ. of Turin in 1820. In 1811 he advanced the hypothesis, since known as Avogadro's law, that equal volumes of gases under identical conditions of pressure
..... Click the link for more information. ], number of particles contained in one molemole,
in chemistry, a quantity of particles of any type equal to Avogadro's number, or 6.02×1023 particles. One gram-molecular weight of any molecular substance contains exactly one mole of molecules.
..... Click the link for more information. of any substance; it is equal to 602,252,000,000,000,000,000,000, or in scientific notation, 6.02252×1023. For example, 12.011 grams of carbon (one mole of carbon) contains 6.02252×1023 carbon atoms, and 180.16 grams of glucose, C6H12O6, contains 6.02252×1023 molecules of glucose. Avogadro's number is determined by calculating the spacing of the atoms in a crystalline solid through X-ray methods and combining this data with the measured volume of one mole of the solid to obtain the number of molecules per molar volume.Avogadro's number[¦a·və¦gäd·drōz ‚nəm·bər] (physics) The number (6.02 × 1023) of molecules in a gram-molecular weight of a substance. Avogadro's number
number [num´ber] a symbol, as a figure or word, expressive of a certain value or a specified quantity determined by count.atomic number (Z) a number expressive of the number of protons in an atomic nucleus, or the positive charge of the nucleus expressed in terms of the electronic charge.Avogadro's number (N) (NA) the number of molecules in one mole of a substance: 6.023 × 1023. Called also Avogadro's constant.CT number the density assigned to a voxel" >voxel in a scan" >CAT scan on an arbitrary scale on which air has a density −1000; water, 0; and compact bone +1000. See also hounsfield unit.mass number (A) the number of nucleons (protons plus neutrons) in the atom of a nuclide; generally indicated by a superscript preceding the symbol of a chemical element (e.g., 131I), denoting a specific isotope.oxidation number a number assigned to each atom in a molecule or ion that represents the number of electrons theoretically gained (positive oxidation numbers) or lost (negative numbers) in converting the atom to the elemental form.LegalSeeNumberFinancialSeenaAcronymsSeeNAvogadro's number
Related to Avogadro's number: Avogadro's constantSynonyms for Avogadro's numbernoun the number of molecules in a mole of a substance (approximately 602,250,000,000,000,000,000,000)SynonymsRelated Words |