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Radioactive elements
Name the elements of the periodic table that have no stable isotopes
Grey elements occur naturally
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Last updated: April 22, 2026
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| First submitted | February 22, 2022 |
| Times taken | 127 |
| Average score | 42.1% | Report this quiz | Report |
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2 Comments
NunoPP03
+1
Level 73
Dec 27, 2023
I don't think Bismuth is still considered a radioactive element.
KevinTheCat
+1
Level 68
Dec 27, 2023
From Wikipedia: "Bismuth was long considered the element with the highest atomic mass whose nuclei do not spontaneously decay. However, in 2003 it was discovered to be extremely weakly radioactive."
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