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atomic mass units
plural of atomic mass unit
atomic emission spectroscopy
(physics, chemistry) A form of analytical spectroscopy that measures the radiation emitted at specific wavelengths by the atoms in a very hot sample
atomic absorption spectroscopy
(chemistry, physics) A quantitative analytical technique in which the content of various elements are measured via their absorption of light
relative atomic mass
(physics) The ratio of the average mass per atom of the naturally occurring form of an element to 1/12 of the mass of a carbon-12 atom. Symbol Aᵣ; abbreviation RAM or r.a.m. For elements with several isotopes, the most stable isotope is treated as the representative.
atomic mass unit
(chemistry) A unit of mass equal to 1/12 the mass of an atom of the ¹²C isotope of carbon.
atomic force microscope
(physics) A device used to map the atomic structure of a surface by measuring the force acting on the very fine tip of a wire moved over the surface
average atomic mass
The weighted average of the atomic masses of the naturally occurring isotopes of an element.