- Atomic weight/Table
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Atomic weight/Table
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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 — 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 Date: 1820 the mass of one atom of an element; specifically the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units see element table … New Collegiate Dictionary
List of elements by atomic weight — This is a list of chemical elements, sorted by standard atomic weight (most stable isotope for artificial elements) and color coded according to type of element. Each element s atomic number, name, element symbol, and group and period numbers on… … 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
Weight — This article is about the physical concept. For other uses, see Weight (disambiguation). A spring scale measures the weight of an object (according to the operational definition) … Wikipedia
atomic — a. of atoms. ♦ atom bomb, ♦ atomic bomb, bomb of which the immense destructive power is due to sudden release of energy by nuclear fission. ♦ atomic number, number representing the magnitude of the positive charge on the nucleus of an… … Dictionary of difficult words
atomic — adj. 1 concerned with or using atomic energy or atomic bombs. 2 of or relating to an atom or atoms. Phrases and idioms: atomic bomb = atom bomb. atomic clock a clock in which the periodic process (time scale) is regulated by the vibrations of an… … Useful english dictionary
Table of the Elements — Infobox record label name = Table of the Elements image bg = black parent = founded = 1993 founder = defunct = distributor = SC Distribution genre = country = USA location = Milwaukee, WI url = http://www.tableoftheelements.comTable of the… … Wikipedia
