atomic mass
atomic weight

Lead has a higher atomic weight than gold, but is far more common.

Do you have a better explanation of a atomic weight?

Atomic weight 7.0 So called from having been discovered in a mineral.

I am sorry but you are making some confusion with atomic weight and mass number.

I would think that the whole stability thing was directly related to atomic weight.

His major work, however, was that on the atomic weights of the elements.

Based on this, in 1828, he created a table of relative atomic weights.

His chart included 63 known elements placed in order of atomic weight.

Given that, my son asked me this: Why isn't the atomic weight of carbon 1 since it's being compared to itself?

He is notable for his work on atomic weights of the elements.