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Which element has the highest atomic weight among stable elements?
ChemistryElements
Quick Answer
Lead is the heaviest stable element by atomic weight, with an average atomic mass of about 207.2 u. It sits near the end of the periodic table and is notable for its high density and historical uses.
The Full Story
Lead is commonly considered the heaviest stable element, with an average atomic weight of about 207.2 atomic mass units. While bismuth was once thought stable, it is now known to be very weakly radioactive. Lead has been used for centuries in pipes, weights, shielding, and pigments, although many of those uses have been restricted because of toxicity. Its stability and density made it important in both ancient and modern technology.
Key Facts
1.Lead atomic weight: about 207.2 u
2.Lead atomic number: 82
3.Historically used for plumbing and shielding
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