Did you mayhaps mean roentgen?
American Heritage® Dictionary of the English Language, Fourth Edition
- n. An artificially produced radioactive element with atomic number 111 and a mass number of 280, whose most stable known isotope has a half-life of 3.6 seconds. See Table at element.
- n. A transuranic chemical element (symbol Rg) with atomic number 111.
- n. a radioactive transuranic element
- Surname of Wilhelm Roentgen + -ium (Wiktionary)
- After Wilhelm Konrad Roentgen. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Roentgenium, after a modern physicist renamed roentgenium by the General Assembly, was originally discovered in 1994 when a team at GSI created three atoms of the element, about a month after their discovery of darmstadtium, on Dec. 8.”
“Elements 110, 111 and 112 have been named darmstadtium (Ds), roentgenium (Rg) and copernicium (Cn).”
“The previous heavyweight winners were copernicium (285) and roentgenium (272).”
“I'll give americium a pass since it goes without saying America rules, but what the hell is roentgenium named after?”
“The isotope with 177 neutrons decays down to dubnium (atomic number 105), whereas the isotope with 176 neutrons decays down to roentgenium (atomic number 111).”
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A list of chemical elements
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