Change your wall charts, chemistry teachers, ...

Atomic Weights of 10 Elements on Periodic Table About to Make an Historic Change

ScienceDaily (Dec. 16, 2010) — For the first time in history, a change will be made to the atomic weights of some elements listed on the Periodic table of the chemical elements posted on walls of chemistry classrooms and on the inside covers of chemistry textbooks worldwide.

For more, go here. Free IUPAC .pdf report here.