![periodic table with charges and molar mass periodic table with charges and molar mass](http://boomeria.org/chemtextbook/table8-3.jpg)
World Wide Web version of atomic weight data originally prepared by G.
![periodic table with charges and molar mass periodic table with charges and molar mass](https://printableshub.com/wp-content/uploads/2021/07/periodic-table-01-2048x1457.jpg)
These tables are based on the 2021 table with changes from the 2019 table for the values of Ar, Hf, Ir, Pb and Yb and changes to the uncertainty for Al, Au, Co, F, Ho, Mn, Nb, Pa, Pr, Rh, Sc, Tb, Tm, and Y. 2021 Atomic Weights IUPAC Commission on Isotopic Abundances and Atomic Weights.