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Words related to actinium

ac·tin·i·um
A a

  • actinon

    a radioisotope of radon that is a decay product of radium. Symbol: An or 219Rn; atomic no: 86; half-life: 3.92s

  • actinide series

    a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium

  • actinium series

    a radioactive decay series that starts with uranium-235 and ends with lead-207

  • mesothorium

    one of two radioactive decay products of thorium, an isotope of radium or actinium.

  • nobelium

    a transuranic element in the actinium series. Symbol: No; atomic number: 102.
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