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atomic mass unit
(redirected from Atomic mass units)

    Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
atomic mass unit
n. Abbr. amu
A unit of mass equal to 1/12 the mass of the most abundant isotope of carbon, carbon 12, which is assigned a mass of 12. Also called dalton.
atomic mass unit
n
(Mathematics & Measurements / Units) a unit of mass used to express atomic and molecular weights that is equal to one twelfth of the mass of an atom of carbon-12. It is equivalent to 1.66 ✕ 10-27 kg Abbreviation amu Also called unified atomic mass unit dalton
atomic mass unit
A unit of mass equal to 1/12 the mass of an atom of the most common isotope of carbon (carbon 12), which is assigned a mass of 12 and has a value of 1.660 × 10-24 grams. A hydrogen atom has a mass of 1 atomic mass unit since its mass is 1/12 the mass of carbon 12. Also called dalton.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.atomic mass unit - unit of mass for expressing masses of atoms or molecules
mass unit - a unit of measurement for mass


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? Mentioned in ? References in periodicals archive
 
But this element has an atomic mass that is more than 200 atomic mass Units (amu).
Name that element! by Bryner, Jeanna / Science World
This claim was consistent with a residual gas analysis up to 44 atomic mass units.
Two primary standards for low flows of gases by Tison, Stuart A. / Journal of Research of the National Institute of Standards and Technology
The peak indicated that the chemists had made a new molecule with 529 atomic mass units -- the total number of protons and neutrons.
Scaling chemistry's peaks by Pennisi, Elizabeth / Science News
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