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 ?
H8m (H autocorrelation of lag8/weighted by atomic masses) is of the GETAWAY descriptors which are geometrical descriptors which encode information on the effective position of substituents and fragments in the molecular space.
An atomic weight is considered as an outlier when the corresponding continued fraction representation provides a mass value outside the interval "atomic mass [+ or -] standard deviation".
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.
For example, with HRMS, glucose has a measured mass of 179.0556 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.) Students will be asked if they think the atomic number and number of layers are related.
So while most mass specs can distinguish between compounds weighing between 407 and 408 atomic mass units (amu) and between 408 and 409 amu, for example, the FT-ICR-MS can detect a substance with a mass of 407.0259 amu.
Tanner has merged atomic mass spectrometry with flow cytometry to create 'mass cytometry,' which has the potential to revolutionize cancer research and drug discovery.
By allowing students to see and create atoms on their own, it is much easier to introduce the periodic table of elements later, because students often struggle with differentiating between atomic number and atomic mass. Atomic mass refers to the total weight of protons, neutrons, and electrons, while atomic number refers to the number of protons.
where [M.sub.1] is the atomic mass of the parent metal of the solvent; [M.sub.j] is the atomic mass of the added element.
Fundamental Properties of Elements Used in Common Solder Alloys ELEMENT LEAD TIN SILVER COPPER Symbol Pb Sn Ag Cu Atomic number (Z) 82 50 47 29 Atomic mass (amu) 207.2 118.71 107.8682 63.546 Number of protons 82 50 47 29 Number of neutrons 125 69 61 35 Density (g/[cm.sup.3]) 11.34 7.31 10.5 8.96