Radioactivity

Radioactivity is the property of unstable atomic nuclei to spontaneously emit ionizing radiation. The radioactive elements in this overview are subdivided according to the half-lives of their most stable isotopes.

slightly radioactive

Radioactive elements: The most stable isotope is very long-lived, with a half-life of over four million years.

significantly radioactive

Radioactive elements: The most stable isotope has a half-life between one day and 130 years.

highly radioactive

Highly radioactive elements: The most stable isotope has a half-life between a few minutes and one day.

radioactive

Radioactive elements: The most stable isotope has a half-life between 800 and 34,000 years.

extremely radioactive

Extremely radioactive elements: The most stable isotope has a half-life of less than a few minutes. Due to their extreme instability and radioactivity, few properties of these elements are researched.

H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

Legend

slightly radioactive significantly radioactive highly radioactive radioactive extremely radioactive