atomic weight

created by whort
(idea) by whort (6.5 y) (print)   ?   (I like it!) Sat Nov 13 1999 at 10:00:57
The average mass of an atom of a given element, allowing for the relative abundance of different isotopes. It is stated in terms of the mass of a proton.
(thing) by CentrX (9.3 mon) (print)   ?   (I like it!) Sat Sep 30 2000 at 20:14:11

In chemistry, the mass of one atom of an element expressed in atomic mass units. It is the average mass of all the isotopes of an element. One atomic mass unit is exactly one-twelfth the mass of the neutral atom of carbon-12 and is equal to 1.6605 × 10-24 grams.

Also called: relative atomic mass
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