Avogadro's number


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Related to Avogadro's number: Avogadro's constant

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 in a 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.

Avogadro's number (NA)

the number of atoms in exactly 12 g of the isotope of carbon 12C, or 6.02 × 1023. One mole of any monoatomic element contains this number of atoms and one mole of any polyatomic element or molecule contains this number of molecules.

Avogadro's number,

n.pr the number of molecules that exist in one mole: 6.0225 × 1023.

number

a symbol, as a figure or word, expressive of a certain value or a specified quantity determined by count.

atomic number
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; symbol A.
Avogadro's number
see avogadro's number.
mass number
see mass number.
Reynold's number
References in periodicals archive ?
Kibble at England's National Physical Laboratory, this method offers a precise value of the Planck constant, from which one derives Avogadro's number.
In classical physics applications, in statistical mechanics--that is, the theory of gases--it can go to three times Avogadro's number, the number of atoms in a gram-mole of an element or compound, Alder says.
g]NC, where N is Avogadro's number and C is the concentration in mol [cm.