dubnium definition

  • noun:
    • An artificially produced radioactive element with atomic number 105 whose many long-lived isotopes have actually size amounts of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Also referred to as unnilpentium. See Dining Table at element.
    • A transuranic substance factor (sign Db) with atomic quantity 105.
    • A rejected name for rutherfordium.
    • a transuranic factor

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    • Since 104 was already rutherfordium, IUPAC…
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