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That these values will change in the fourth or fifth decimal place has little affect on day to day activities. It does help identify the source of a sample.
 
"Ranges" of Atomic Weight, Pluto not a planet, now I'm not an Aquarius anymore... 😱

WHAT IS THE WORLD COMING TO?

😉
 
For high schools and 100 series chem classes in college, I doubt anything will change. Concepts are more important at this level than a carbon sample really having a mass of 12.00245g/Mol 😉.
 
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