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actinium series

noun

, Chemistry.
  1. the radioactive series that starts with uranium 235 and ends with a stable isotope of lead of mass number 207.


actinium series

noun

  1. a radioactive decay series that starts with uranium-235 and ends with lead-207
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of actinium series1

First recorded in 1955–60
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Example Sentences

The end product of the actinium series is also an element resembling lead, but both the beginning and ending of this series are still in obscurity.

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