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Rutherfordium was reportedly first detected in 1964 at the Joint Institute for Nuclear Research at Dubna (Soviet Union at the time). Researchers there bombarded a plutonium -242 target with neon -22 ions ; a spontaneous fission activity with half-life 0.3 ± 0.1 seconds was detected and assigned to 260 104.
When IUPAC made the final decision of the naming of the elements beyond 100 in 1997, it decided to keep the name "lawrencium" and symbol "Lr" for element 103 as it had been in use for a long time by that point. The name "rutherfordium" was assigned to the following element 104, which the Berkeley team had proposed it for. [43]
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Pages in category "Rutherfordium" The following 3 pages are in this category, out of 3 total. This list may not reflect recent changes. ...
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Like other groups, the members of this family show patterns in their electron configurations, especially the outermost shells, resulting in trends in chemical behavior. Most of the chemistry has been observed only for the first three members of the group; chemical properties of rutherfordium are not well-characterized, but what is known and ...
Dubnium, having an atomic number of 105, is a superheavy element; like all elements with such high atomic numbers, it is very unstable. The longest-lasting known isotope of dubnium, 268 Db, has a half-life of around a day. [ 85 ]
Some data, like standard atomic weight, are read from a central list. This way, enwiki has the same values everywhere. See § Chemical element data sets for more. Parameter naming patterns. Most parameters have a ... ref that allows for references. This reference is added right after the unit. ionization energy ref