a (atomic weight)
31Weight of observation — Weight Weight, n. [OE. weght, wight, AS. gewiht; akin to D. gewigt, G. gewicht, Icel. v[ae]tt, Sw. vigt, Dan. v[ae]gt. See {Weigh}, v. t.] [1913 Webster] 1. The quality of being heavy; that property of bodies by which they tend toward the center… …
32atomic heat — n the heat capacity per gram atomic weight of any element: the specific heat in calories per degree per gram multiplied by the atomic weight compare MOLECULAR HEAT * * * the product of the atomic weight of an element and its specific heat …
33atomic mass — n the mass of an atom usu. expressed in atomic mass units also ATOMIC WEIGHT compare MASS NUMBER * * * atomic weight; used particularly when describing a single isotope of a nuclide …
34Atomic stopping power — is a measure of the energy loss of a particle (usually a heavy, ionizing particle such as an alpha particle) traveling through a material. Usually expressed as MeV cm², the atomic stopping power is the energy loss of a particle per distance… …
35atomic mass — n. the mass of a given atom, usually expressed in atomic mass units: it is the atomic weight multiplied by the atomic mass unit …
36atomic mass unit — n a unit of mass for expressing masses of atoms, molecules, or nuclear particles equal to 1/12 the mass of a single atom of the most abundant carbon isotope 12C called also dalton * * * (u) (amu) the unit mass equal to the mass of the nuclide of… …
37atomic volume — n. Chem. the quotient obtained by dividing the atomic weight of an element by its density …
38gram atom, gram atomic weight — older names for the atomic mass unit …
39Atomic mass — The atomic mass (ma) is the mass of an atom, most often expressed in unified atomic mass units. [GoldBookRef|file=A00496|title=atomic mass] The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom …
40Atomic number — See also: List of elements by atomic number An explanation of the superscripts and subscripts seen in atomic number notation. In chemistry and physics, the atomic number (also known as the proton number) is the number of protons found in the… …
