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atomic weights

См. также в других словарях:

  • chemical atomic weights — Element El e*ment, n. [F. [ e]l[ e]ment, L. elementum.] 1. One of the simplest or essential parts or principles of which anything consists, or upon which the constitution or fundamental powers of anything are based. [1913 Webster] 2. One of the… …   The Collaborative International Dictionary of English

  • scale of atomic weights — atominių svorių skalė statusas T sritis fizika atitikmenys: angl. scale of atomic weights vok. Atommassenskala, f rus. шкала атомных весов, f pranc. échelle de poids atomiques, f …   Fizikos terminų žodynas

  • Atomic weight — (symbol: A sub|r) is a dimensionless physical quantity, the ratio of the average mass of atoms of an element (from a given source) to 1/12 of the mass of an atom of carbon 12.cite journal | author = International Union of Pure and Applied… …   Wikipedia

  • Atomic theory — Atomic model redirects here. For the unrelated term in mathematical logic, see Atomic model (mathematical logic). This article is about the historical models of the atom. For a history of the study of how atoms combine to form molecules, see… …   Wikipedia

  • Atomic mass — The atomic mass (ma) is the mass of an atom, most often expressed in unified atomic mass units. [GoldBookRef|file=A00496|title=atomic mass] The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom …   Wikipedia

  • atomic weight — Chem. the average weight of an atom of an element, formerly based on the weight of one hydrogen atom taken as a unit or on 1/16 the weight of an oxygen atom, but after 1961 based on 1/12 the weight of the carbon 12 atom. Abbr.: at. wt. [1820 30]… …   Universalium

  • Atomic mass unit — unified atomic mass unit Unit system: SI recognized unit Unit of... mass Symbol: u Unit conversions 1 u in... is equal to...    dalton …   Wikipedia

  • Atomic number — See also: List of elements by atomic number An explanation of the superscripts and subscripts seen in atomic number notation. In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the… …   Wikipedia

  • Atomic mass constant — In physics and chemistry, the atomic mass constant, m u, is one twelfth of the mass of an unbound atom of the carbon 12 nuclide at rest and in its ground state. [GoldBookRef|title=atomic mass constant|url=http://goldbook.iupac.org/A00497.html] It …   Wikipedia

  • atomic weight — UK / US noun [countable/uncountable] Word forms atomic weight : singular atomic weight plural atomic weights chemistry relative atomic mass …   English dictionary

  • atomic mass unit — ► NOUN ▪ a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon 12 …   English terms dictionary

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