American Heritage® Dictionary of the English Language, Fourth Edition
- n. An artificially produced radioactive element with atomic number 104 whose most long-lived isotopes have mass numbers of 253, 255, 257, and 259 with half-lives of 1.8, 1.6, 4.7, and 3.4 seconds, respectively. See Table at element.
- n. A transuranic chemical element (symbol Rf) with an atomic number of 104
- n. obsolete A rejected name for seaborgium
- n. a radioactive transuranic element which has been synthesized
- Named for Ernest Rutherford (Wiktionary)
- After Ernest Rutherford. (American Heritage® Dictionary of the English Language, Fourth Edition)
“Since 104 was already rutherfordium, IUPAC renamed L04 dubnium, for the Russian team that claims it discovered that element years ago.”
“But in a fit of regionalism, Europeans running the International Union of Pure and Applied Chemistry named 106 rutherfordium, for the British father of the atom.”
“Researchers at Lawrence Berkeley National Laboratory in California saw the isotopes of rutherfordium, seaborgium, hassium, darmstadtium, and copernicium by watching the decay of the yet-to-be-named element 114, a synthetic element first produced about a decade ago.”
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