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The experiments relied on the expectation that rutherfordium would be a 6d element in group 4 and should therefore form a volatile molecular tetrachloride, that would be tetrahedral in shape. [72] [79] [80] Rutherfordium(IV) chloride is more volatile than its lighter homologue hafnium(IV) chloride (HfCl 4) because its bonds are more covalent. [2]
Rutherfordium (104 Rf) is a synthetic element and thus has no stable isotopes. A standard atomic weight cannot be given. The first isotope to be synthesized was either 259 Rf in 1966 or 257 Rf in 1969. There are 17 known radioisotopes from 252 Rf to 270 Rf (three of which, 266 Rf, 268 Rf, and 270 Rf, are unconfirmed) and several isomers.
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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 ...
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The petition filed by over 20 consumer advocacy groups in 2022 that argued for the removal of Red Dye No. 3 from food and dietary supplements cited studies, the FDA's prior use of the Delaney ...
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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. ...