atomic mass

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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

a·tom·ic mass

(ă-tomik mas)
Total number of protons, neutrons, and electrons in an atom.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
It is fact that the "mean atomic mass" of a mononuclidic element is everywhere in the universe exactly the same, while we would expect some variations in the atomic masses of polynuclidic elements when analyzing rock samples obtained from different galaxies.
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 improved atomic masses have also added impetus to an effort by NIST researchers to increase the precision of measurements of gamma-ray wavelengths in nuclear processes.
Therefore, as confirmed by our simulations, this method of current generation mainly depends on the atomic masses of the counterions, but does not qualitatively depend on the chemical structures or signs of charges of the counterions.
The velocities of the cation were very close to the average velocities of the water molecules, since the atomic masses of the atoms in the cation were close to those of the atoms in water molecules.
"Properties of plain bodies, and also forms and properties of compounds of the elements, have a periodic dependence on the numerical values of the atomic masses of the elements".
Elements of the same Period have very close numerical values of their atomic masses, but different physical and chemical properties.
Then, after actinides, a region of the atomic masses of the elements of Period 7 (elements 104-118) is located.
Once we get a ratio of the difference between the table and calculated numerical values of the atomic masses to the respective a.m.u., we obtain Fig.
Here we adopted Muller's formalism and present the abundance data as a function of the natural logarithm of the atomic masses (here mean values from a periodic table were used) which were previously divided by the lowest atomic weight available (hydrogen).
The objective of this study is to determine the possible number of chemical elements, along with atomic masses and atomic numbers up to the final entry in the Periodic Table.