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ionium
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The answer IONIUM has 4 possible clue(s) in existing crosswords.
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The word IONIUM is VALID in some board games. Check IONIUM in word games in Scrabble, Words With Friends, see scores, anagrams etc.
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Definitions of ionium in various dictionaries:
noun - an isotope of thorium
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Possible Crossword Clues |
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Radioactive isotope |
Radioactive thorium isotope |
Isotope of thorium |
Last Seen in these Crosswords & Puzzles |
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Sep 9 2016 Newsday.com |
Apr 13 2004 Eugene Sheffer - King Feature Syndicate |
Jan 17 2003 New York Times |
Feb 1 2002 Wall Street Journal |
Possible Dictionary Clues |
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A supposed decomposition-product of actinium once thought to be the source of radium |
A radioactive isotope of thorium with mass number 230, produced by the alpha decay of uranium-234 and decaying in turn to radium-226 with a half-life of 75,000 years. Symbols Io, 230Th. |
Ionium might refer to |
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Although thorium (90Th) has 6 naturally occurring isotopes, none of these isotopes are stable; however, one isotope, 232Th, is relatively stable, with a half-life of 1.405×1010 years, considerably longer than the age of the Earth, and even slightly longer than the generally accepted age of the universe. This isotope makes up nearly all natural thorium. As such, thorium is considered to be mononuclidic. However, in 2013 IUPAC reclassified thorium as binuclidic, due to large amounts in 230Th in deep seawater. Thorium has a characteristic terrestrial isotopic composition and thus a standard atomic weight can be given. * Thirty radioisotopes have been characterized, with the most stable (after 232Th) being 230Th with a half-life of 75,380 years, 229Th with a half-life of 7,340 years, and 228Th with a half-life of 1.92 years. All of the remaining radioactive isotopes have half-lives that are less than thirty days and the majority of these have half-lives that are less than ten minutes. One is |