Roentgenium Definition
rĕnt-gĕnē-əm, -jĕn- rŭnt-, rœnt-gen-
noun
A radioactive chemical element with a very short half-life: a transactinide produced by bombarding bismuth with nickel atoms: symbol, Rg; at. no. 111
Webster's New World
An artificially produced radioactive element with atomic number 111 that has only been produced in trace amounts. Its most stable known isotope has a mass number of 280 and a half-life of 3.6 seconds.
American Heritage
Synonyms:
- atomic number 111
- element 111
- rg
Origin of Roentgenium
After Wilhelm Conrad Roentgen
From American Heritage Dictionary of the English Language, 5th Edition
After Wilhelm Conrad Roentgen
From American Heritage Dictionary of the English Language, 5th Edition
Surname of Wilhelm Roentgen + -ium
From Wiktionary
Roentgenium Is Also Mentioned In
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