Lexic.us

Definition of Atomic mass

1. Noun. (chemistry) the mass of an atom of a chemical element expressed in atomic mass units.

Definition of Atomic mass

1. Noun. The mass of an atom. ¹

2. Noun. (proscribed) atomic weight; the average mass of atoms of an element. ¹

¹ Source: wiktionary.com

Medical Definition of Atomic mass

1. The mass of an atom relative to other atoms. The present-day basis of the scale of atomic weights is carbon, the most common isotope of this element has arbitrarily been assigned an atomic weight of 12. The unit of the scale is 1/12 the weight of the carbon atom or roughly the mass of one proton or one neutron. The atomic weight of any element is approximately equal to the total number of protons and neutrons in is nucleus (16 Dec 1997)

Lexicographical Neighbors of Atomic Mass

Literary usage of Atomic mass

Below you will find example usage of this term as found in modern and/or classical literature:

1. Journal of the American Chemical Society by American Chemical Society (1899)
"I. THE atomic mass OF TUNGSTEN. THERE have been numerous determinations of the atomic mass of tungsten made in this laboratory; but as there were noted ..."

2. The Chemical News and Journal of Industrial Science (1903)
"This extension was increased with the atomic mass of the metal, and with the greater atomic mass in this group the volatility of the metal is also greater. ..."

3. A Text-book of elementary chemistry: Theoretical and Inorganic by George Frederick Barker (1891)
"RELATION OF DENSITY TO atomic mass. 96. Molecular Volume.—By the law of Avogadro, all molecules have the same size ; that is, all molecules when in the ..."

4. Physical Chemistry for Colleges: A Course of Instruction Based Upon the by Earl Bowman Millard (1921)
"The two chief spots for neon are shown by careful comparative measurements Atomic Mass. FIG. 52.—Mass spectrum of neon. on the actual photographic plates to ..."

5. Report of the Annual Meeting (1904)
"of each metal of the group, and were clearly associated with the atomic mass and chemical properties in each case. The arrangement of the lines, ..."

6. Essentials of Chemistry by John Charles Hessler, Albert Lincoln Smith (1902)
"We can get the relation between the numbers of atoms of each element in the molecule by dividing the per cent of each element by the atomic mass. ..."

7. Read & Understand Science Grades 4-6 by Evan-Moor Educational Publishers, Ana Shirazi, Delana Heidrich, Judith Herbst, Kathleen Simpson (2005)
"On the modern chart, elements are listed by atomic number instead of atomic mass. We know about atomic numbers today because we have learned about the parts ..."

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