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| Known properties | |||||
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| Name, Symbol, Number | Rutherfordium, Rf, 104 | ||||
| Chemical series | Transition metals | ||||
| Group, Period, Block | 4, 7 , d | ||||
| AppearanceFor alternative meanings, see color (disambiguation). visual arts. Color (or colour is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view. The perception of | unknown; probably metallic, silvery white or gray | ||||
| Atomic weightIn reference to a certain isotope of a chemical element, atomic weight (more accurately relative atomic mass though also called simply atomic mass is the mass of one atom of the isotope expressed in units atomic mass unit amu) such that the Carbon-12 isot | |||||
| Electron configurationElectron configuration is the arrangement of electrons in an atom, molecule or other body. Specifically, it is the placement of electrons into atomic, molecular, or other forms of electron orbitals. Orbitals, states, and wavefunctions Since electrons are | probably | ||||
| e-The electron (also called negatron commonly represented as e&minus is a subatomic particle. In an atom the electrons surround the nucleus of protons and neutrons in an electron configuration. Electrons have the smallest electrical charge and when they mov 's per energy levelAn energy level is a quantified stable energy, which a physical system can have; the term is most commonly used in reference to the electron configuration of electrons, in atoms or molecules. According to quantum theory, only certain energy levels are pos | 2,8,18,32,32,10,2 | ||||
| State of matter | Presumably a solid | ||||
Rutherfordium is a chemical element in the periodic table that has the symbol Rf and atomic number 104. This is a highly radioactive synthetic element whose most stable isotope has a half life of less than 70 seconds. This element therefore is not used for anything and little is known about it. Rutherfordium is the first transactinide element and it is predicted to have chemical properties similar to hafnium.
Rutherfordium (named in honor of Lord Rutherford of Nelson) was reportedly first synthesized in 1964 at the Joint Nuclear Research Institute at Dubna ( U.S.S.R.). Researchers there bombarded plutonium with accelerated 113 to 115 MeV neon ions and claimed that they detected nuclear fission tracks in a special type of glass with a microscope which indicated the presence of a new element.
In 1969 researchers at the University of California, Berkeley synthesized the element by subjecting californium-249 and carbon-12 to high energy collisions. The UC group also stated that they could not reproduce the earlier synthesis by Soviet scientists.
This resulted in an element naming controversy; Since the Soviets claimed that it was first detected in Dubna, Dubnium (Db) was suggested, as was Kurchatovium and symbol Ku for element 104, in honor of Igor Vasilevich Kurchatov ( 1903- 1960), former Head of Soviet Nuclear Research. The Americans, however, proposed Rutherfordium (symbol Rf) for the new element to honor Ernest Rutherford, a noted nuclear physicist from New Zealand. The International Union of Pure and Applied Chemistry ( IUPAC) adopted Unnilquadium (symbol Unq) as a temporary name for this element. However in 1997 they resolved the dispute and adopted the current name.
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