l0izabelchi9dar l0izabelchi9dar

07-02-2016
Chemistry

contestada

Why is the value listed for atomic mass for each element on the periodic table not a whole number?
A. It is an average.
B. It is a measurement error.
C. The numbers of protons can vary for an element.
D. The number of electrons can vary for an element.

Respuesta :

cathyjean1233 cathyjean1233

14-11-2017

A. it is an average

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