(amu,u) amu; dalton. A unit of mass equal to 1/12 the mass of a carbon-12 nucleus, which is 1.660 538 73 × 10
-27 kg ± 0.000 000 13 × 10
-27 kg [1998 CODATA values]. Abbreviated as amu or u. Sometimes called the dalton, after John Dalton, architect of the first modern atomic theory.
Found on
http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml
The amu without the `unified` prefix is technically an obsolete unit based on oxygen, which was replaced in 1961. However, some sources still use the amu but now define it in the same way as u (based on carbon-12). In this sense, most uses of atomic mass units or amu today actually refer to unified atomic mass units or u. For standardization a s.....
Found on
http://en.wikipedia.org/wiki/Atomic_mass_unit
(from the article `atom`) The mass of atoms is measured in terms of the atomic mass unit, which is defined to be 112 of the mass of an atom of carbon-12, or 1.6605402 1024 ...
Found on
http://www.britannica.com/eb/a-z/a/120
(AMU) One twelfth of a mass of an atom of the carbon-12 isotope; a unit used for stating atomic and formula weights; also called dalton.
Found on
http://www.chemistry-dictionary.com/definition/atomic+mass+unit+%28amu%29.p
The standard unit in which the masses of atoms and molecules are measured. One atomic mass unit (amu) is defined as one-twelfth of the mass of a single atom of the isotope carbon-12. This is 1.6605 × 10
-27 kg, or approximately 931 MeV. The above definition was agreed up...
Found on
http://www.daviddarling.info/encyclopedia/A/atomic_mass_unit.html
the mass of an atom of carbon 12 divided by 12
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-04-06
<chemistry> One-twelfth the mass of a neutral atom of the most abundant isotope of carbon. ... (16 Dec 1997) ...
Found on
http://www.encyclo.co.uk/local/20973
(u) (amu) the unit of mass equal to 1/12 the mass of the nuclide of carbon 12. Called also dalton.
Found on
http://www.encyclo.co.uk/local/21001
(amu) Type: Term Definitions: 1. a unit of mass equal by definition to 112 of the mass of an atom of carbon-12, which equals 1.6605402 ׀ 10−27 kg; in terms of energy, 1 amu equals 931.49432 MeV.
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http://www.medilexicon.com/medicaldictionary.php?t=95663
[
n] - unit of mass for expressing masses of atoms or molecules
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http://www.webdictionary.co.uk/definition.php?query=atomic%20mass%20unit
Defined as one twelfth of the mass of the most abundant isotope of carbon (
12C)1 atomic mass unit = 1.66053873x10
-27kgttle='Atomic Mass Unit';consttxt='amu';constval=1.66053873e-27;constunt='kg';Before 1960 the atomic mass unit was defined in terms of the mass of an oxygen isotope (
16O) and 1 amu = 1.6599 x 10
-...
Found on https://www.encyclo.co.uk/local/20687
noun unit of mass for expressing masses of atoms or molecules
Found on https://www.encyclo.co.uk/local/20974
Unit of mass that is used to measure the relative mass of atoms and molecules. It is equal to one-twelfth of the mass of a carbon-12 atom, which is approximately the mass of a proton or 1.66 × 10-27 kg. The relative atomic mass of an atom has no units; thus oxygen-16 has an atomic mass of 16 daltons b...
Found on https://www.encyclo.co.uk/local/21221
Also calleda unit of mass, equal to the mass of the carbon-12 atom and used to express the mass of atomic and subatomic particles. · (formerly) a unit of mass, equal to the mass of an oxygen atom having atomic mass 16. Abbr.: amu, AMU
Found on https://www.infoplease.com/dictionary/atomic-mass-unit
No exact match found.
