atomic mass

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Related to Atomic masses: relative atomic mass


1. a lump or collection of cohering particles.
2. that characteristic of matter that gives it inertia. Symbol m.
atomic mass atomic weight; see also atomic mass unit.
inner cell mass an internal cluster of cells at the embryonic pole of the blastocyst which develops into the body of the embryo.
lean body mass that part of the body including all its components except neutral storage lipid; in essence, the fat-free mass of the body.
relative molecular mass technically preferable term for molecular weight.

atomic mass (A)

the average mass, relative to an atom of carbon, of an atom of an element based on the natural isotopic mix of that element. Also called atomic weight. See also atomic mass unit.

a·tom·ic mass

(ă-tomik mas)
Total number of protons, neutrons, and electrons in an atom.
References in periodicals archive ?
Therefore we give priority to the atomic masses of the mononuclidic chemical elements and only the first part of the data set has been analyzed thoroughly.
The relative atomic masses are now the second data set that can be described by the bipolar model of oscillations in a chain system.
The author dedicated the next two years to the work in this direction, which was a correction of atomic masses, an elaboration of studies about the periodical properties of elements, about the role of Groups, of big and small Periods, as well as about the places of chemical combinations in the Table.
Once we get a ratio of the difference between the table and calculated numerical values of the atomic masses to the respective a.
Hence, one third of 118 elements (known in science at the present time) bears undetermined atomic masses.
In addition to the indeterminacy of atomic masses in the synthesis of superheavy elements, Oganesyan also told, in his papers, that we do not know limits in the Table of Elements behind whom superheavy elements cannot exist.
The considered dependency of atomic masses of the elements on their numbers in the Table of Elements cannot answer the question "where is the upper limit of the Table".
Besides, the possibility of different isotopic content in samples of the elements leads to a large deviation of the calculated atomic masses from the atomic masses given by the Table of Elements.
Hence, atomic masses attributed to these numbers in the Table of Elements, are determined very approximate.
Finally, the following atomic masses were obtained: No.