MASS NUMBER


Meaning of MASS NUMBER in English

(M,A) Compare with atomic number and atomic weight .The total number of protons and neutrons in an atom or ion. In nuclide symbols the mass number is given as a leading superscript. In isotope names (e. g. carbon-14, sodium-23) the mass number is the number following the element name.

General chemistry English glossary.      Английский глоссарий общей химии.