Periodic table radioactivity
Blue - Elements that contain at least one stable isotope. Green - Radioactive elements: the most stable isotope is very long-lived, with s half-life of over four million years. Yellow - Radioactive elements: the most stable isotope has a half-life between 800 and 34.000 years. Orange - Radioactive elements: the most stable isotope has a half-life between one day and 103 years. Red - Highly radioactive elements: the most stable isotope has a half-life between several minutes and one day. Purple - Extremely radioactive elements: the most stable isotope has a half-life less than several minutes. Very little is known about these elements due to their extreme instability and radioactivity.
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