Meaning of ATOMIC WEIGHT (ATOMIC MASS) in English

ATOMIC WEIGHT (ATOMIC MASS)

Say it

The average mass of an atom of an element, usually expressed in atomic mass units . The terms mass and weight are used interchangeably in this case. The atomic weight given on the periodic table is a weighted average of isotopic masses found in a typical terrestrial sample of the element.

General chemistry English glossary.      Английский глоссарий общей химии.