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PT/Chem: Radioactive Elements - 21 Random
Type the Element name for the given symbol.
The 37 radioactive elements are #43, #61, and #84 thru #118.
Only four exist naturally on earth - Radon, Radium, Thorium, & Uranium.
Only four exist naturally on earth - Radon, Radium, Thorium, & Uranium.
See also PT/Chem: Elements 1-95 and PT/Chem: Symbols 1-15
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Last updated: March 13, 2026
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| First submitted | April 18, 2024 |
| Times taken | 148 |
| Average score | 71.4% | Report this quiz | Report |
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