Template talk:Periodic table legend

Latest comment: 9 years ago by Double sharp in topic Untitled discussion
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Untitled discussion edit

What is the atomic weight of polonium? Is it (209) or (210) as indicated periodic table?

It's (209), as that's the polonium isotope with the longest known half-life. Double sharp (talk) 08:28, 30 March 2015 (UTC)Reply