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Template:Periodic table (transuranium element)
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Elements which contain at least one stable isotope.
Slightly radioactive elements: the most stable isotope is very long-lived, with a half-life of over two million years.
Radioactive elements: the most stable isotope has half-life between 800 and 34,000 years.
Significantly radioactive elements: the most stable isotope has half-life between one day and 130 years.
Highly radioactive elements: the most stable isotope has half-life between several minutes and one day.
Extremely radioactive elements: the most stable known isotope has half-life less than several minutes.
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