unnilpentium


unnilpentium

noun Chemistry, Physics.

  1. a former name of dubnium. Symbol: Unp

noun Chemistry, Physics.

  1. a proposed name for dubnium. Symbol: Ha

noun Chemistry, Physics.

  1. a superheavy, synthetic, radioactive element with a very short half-life. Symbol: Db; atomic number: 105.

noun Chemistry, Physics.

  1. dubnium.

noun

  1. a synthetic transactinide element produced in minute quantities by bombarding plutonium with high-energy neon ions. Symbol: Du; atomic no 105See hahnium

noun

  1. a name once advanced by the American Chemical Society for a transuranic element, artificially produced from californium, atomic no: 105; half-life of most stable isotope, 262 Ha: 40 secondsNow called dubnium

Db

  1. A synthetic, radioactive element that is produced from californium, americium, or berkelium. Its most long-lived isotopes have mass numbers of 258, 261, 262, and 263 with half-lives of 4.2, 1.8. 34, and 30 seconds, respectively. Atomic number 105. See Periodic Table.

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