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 weight — Weight Weight, n. [OE. weght, wight, AS. gewiht; akin to D. gewigt, G. gewicht, Icel. v[ae]tt, Sw. vigt, Dan. v[ae]gt. See {Weigh}, v. t.] [1913 Webster] 1. The quality of being heavy; that property of bodies by which they tend toward the center… … The Collaborative International Dictionary of English
atomic weight — n. Chem. the weight of one atom of an element expressed in atomic mass units: it is the average weight of all the isotopes of the element … English World dictionary
atomic weight — n the mass of one atom of an element specif the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units see ELEMENT (table) * * * the sum of the masses of the constituents of an atom, either that of a… … Medical dictionary
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 weight — noun (chemistry) the mass of an atom of a chemical element expressed in atomic mass units • Syn: ↑atomic mass, ↑relative atomic mass • Topics: ↑chemistry, ↑chemical science • Hypernyms: ↑ … Useful english dictionary
atomic weight — noun a) Former term for the more specific relative atomic mass. The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen. b) A term used to represent the mean relative atomic… … Wiktionary
atomic weight — UK / US noun [countable/uncountable] Word forms atomic weight : singular atomic weight plural atomic weights chemistry relative atomic mass … English dictionary
atomic weight — santykinė atominė masė statusas T sritis Standartizacija ir metrologija apibrėžtis Cheminio elemento vidutinės masės ir nuklido ¹²C atomo masės 1/12 dalies dalmuo. atitikmenys: angl. atomic mass; atomic weight; relative atomic mass vok. Atommasse … Penkiakalbis aiškinamasis metrologijos terminų žodynas
atomic weight — santykinė atominė masė statusas T sritis Standartizacija ir metrologija apibrėžtis Vidutinės elemento atomų masės ir 1/12 nuklido ¹²C atomo masės dalmuo. atitikmenys: angl. atomic mass; atomic weight; relative atomic mass vok. Atommasse, f;… … Penkiakalbis aiškinamasis metrologijos terminų žodynas
