atomic mass


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atomic mass

n.
The mass of an atom, usually expressed in atomic mass units.

atomic mass

n
1. (Chemistry) the mass of an isotope of an element in atomic mass units
2. (Chemistry) short for relative atomic mass See atomic weight

atom′ic mass′


n.
the mass of an isotope of an element measured in units based on 1/12 the mass of the carbon-12 atom. Abbr.: at. m.

atomic mass

The mass of a given atom or molecule, expressed in atomic mass units. Compare atomic weight.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass unitsatomic mass - (chemistry) the mass of an atom of a chemical element expressed in atomic mass units
mass - the property of a body that causes it to have weight in a gravitational field
combining weight, eq, equivalent weight, equivalent - the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen
meq, milliequivalent - one-thousandth of an equivalent
chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
Translations

atomic mass

n (Chem) → massa atomica
References in periodicals archive ?
3 when the atomic mass and the molecular mass are equal, i.
This element, which can bind to form ozone, has an atomic mass of 15.
The inertial mass of an given atomic nucleus is the atomic mass units it possesses, but this atomic mass is not exactly equivalent to the total of neutrons and protons.
Abundance sensitivity--high levels of an element having an atomic mass adjacent to the atomic mass of the element of interest can obscure that analyte by tailing into its mass peak.
The standard atomic weights, including the proton and electron reference masses were taken from the web-site of the National Institute of Standards (NIST) and were expressed in the atomic mass unit u.
While the right panel of Figure 3 only shows the resulting plot, the EJS simulation contains a panel with which the user can change the atomic mass number and mass in order to analyze the orbitals of other atoms.
According to the Atomic Mass Spectroscopy Lab at the University of Arizona in Tucson, they are newer than 13,000 years old.
The 3 Bosons then combined with Electrons to form 5 various geometrical particles we now identified as Higgs Bosons that was discovered by CERN this year and is also confirmed by the Atomic Mass, Atomic Number and Period of each Element in each Block on the Periodic Table.
The mass of the observed "nanograins" ranges from a few hundred to a few tens of thousands of atomic mass units (proton masses), and must therefore contain tens to thousands of water molecules bound together.
ATOMIC MASS equals the number of protons plus the number of neutrons (uncharged particles) found in a single atom of an element.
0556 atomic mass units (amu), compared with 179 amu as detected by a regular mass spectrometer.
As an atom grows, its atomic number increases, as well as its atomic mass and the number of electron shells, or layers it has.