uranium series

noun
variants: or uranium-radium series

Definition of uranium series

: a radioactive series beginning with uranium I of mass number 238 and ending with radium G constituting the nonradioactive isotope of lead of mass number 206: uranium I, at. no. 92→uranium X1 at. no. 90 (synonym thorium 234)→uranium X2, at. no. 91 (syn. protactinium 234)→uranium II, at. no. 92 (syn. uranium 234)→ionium, at. no. 90 (syn. thorium 230)→radium 226, at. no. 88→radon 222, at. no. 86→radium A, at. no. 84 (syn. polonium 218)→radium B, at. no. 82 (syn. lead 214) [or astatine 218]→radium C, at. no. 83 (syn. bismuth 214)→radium C′, at. no. 84 (syn. polonium 214) [or radium C″, at. no. 81 (syn. thallium 210)]→radium D, at. no. 82 (syn. lead 210)→radium E, at. no. 83 (syn. bismuth 210)→radium F, at. no. 84 (syn. polonium 210)→radium G, at. no. 82 (syn. lead 206)

called also radium series

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Learn More About uranium series

Dictionary Entries Near uranium series

uranium ray

uranium series

uranium tetrafluoride

See More Nearby Entries 

Statistics for uranium series

Cite this Entry

“Uranium series.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uranium%20series. Accessed 20 Jan. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!