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Atomic weight   /ətˈɑmɪk weɪt/   Listen
Atomic weight

noun
1.
(chemistry) the mass of an atom of a chemical element expressed in atomic mass units.  Synonyms: atomic mass, relative atomic mass.



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"Atomic weight" Quotes from Famous Books



... hand, there is evidence arising from the atomic weight of lead which seems to involve some other parent than uranium. Soddy, in the work referred to, points this out. The atomic weight of radium is well known, and uranium in its descent has to change to this element. The loss of mass between radium and uranium-derived lead can be accurately ...
— The Birth-Time of the World and Other Scientific Essays • J. (John) Joly

... atom of nitrogen is 4.66 times heavier than an atom of hydrogen; in other words, if the atomic weight of hydrogen is taken as unity, the atomic weight of nitrogen is expressed by the number 4.66. Dalton referred the atomic weights of the elements to the atomic weight of hydrogen as unity, because hydrogen is lighter than any other substance; hence the numbers which tell how much heavier the atoms of the elements are than an atom of hydrogen are always greater than one, ...
— The Story of Alchemy and the Beginnings of Chemistry • M. M. Pattison Muir

... it expresses a real fact is certain, for in the original scheme there were several gaps representing undiscovered elements, the properties of which were predicted from that of their associates in the table. Some of these have since been discovered, and their atomic weight and physical properties accord ...
— The Machinery of the Universe - Mechanical Conceptions of Physical Phenomena • Amos Emerson Dolbear

... this was written, however, men of science have become less unanimous than they formerly were on this point. The veteran chemist Professor Mendeleeff has given reasons for thinking that the ether is an inert gas with an atomic weight a million times less than that of hydrogen, and a velocity of 2250 kilometres per second (Principles of Chemistry, Eng. ed., 1905, vol. ii. p. 526). On the other hand, the well-known physicist Dr A.H. Bucherer, speaking at ...
— The New Physics and Its Evolution • Lucien Poincare

... view of the case, merely, and not shared in to any appreciably extent by the gentlemen who were managing our boarding house. We seemed to view the matter through allopathic spectacles, they through homoeopathic lenses. We thought that the atomic weight of peas (or beans) and the James River fluid were about equal, which would indicate that the proper combining proportions would be, say a bucket of beans (or peas) to a bucket of water. They held that the nutritive potency was increased by the dilution, and the best results were ...
— Andersonville, complete • John McElroy



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