View synonyms for atomic mass

atomic mass

[ uh-tom-ik mas ]

Phonetic (Standard)IPA

noun

, Chemistry.

the mass of an isotope of an element measured in units formerly based on the mass of one hydrogen atom taken as a unit or on 1/16 (0.0625) the mass of one oxygen atom, but after 1961 based on 1/12 (0.0833) the mass of the carbon-12 atom.

atomic mass

the mass of an isotope of an element in atomic mass units
See atomic weight, relative atomic mass
short for relative atomic mass See atomic weight

atomic mass

First recorded in 1895–1900

What is specially of interest is that the indicated atomic mass of each of the constituents is a whole number.

The best evidence that these particles are of atomic mass is furnished by their deflection in electric and magnetic fields.

April 24, 2024gallimaufry

[gal-uh-maw-free ]

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