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The transuranium (or transuranic) elements are the chemical elements with atomic number greater than 92, which is the atomic number of uranium. All of them are radioactively unstable and decay into other elements. Except for neptunium and plutonium, which have been found in trace amounts in nature, none occur naturally on Earth and they are ...
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Berkelium-249 is a common target nuclide to prepare still heavier transuranium elements and superheavy elements, [86] such as lawrencium, rutherfordium and bohrium. [16] It is also useful as a source of the isotope californium-249, which is used for studies on the chemistry of californium in preference to the more radioactive californium-252 ...
Bahasa Indonesia; Italiano; ... By definition, superheavy elements are also transuranium elements, i.e., having atomic numbers greater than that of uranium (92).
A radioactive metal, it is the tenth transuranium element, the second transfermium, and is the penultimate member of the actinide series. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles.
Edwin Mattison McMillan (September 18, 1907 – September 7, 1991) was an American physicist credited with being the first to produce a transuranium element, neptunium.For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg.
Ausenium (atomic symbol Ao) and hesperium (atomic symbol Es) were the names initially assigned to the transuranic elements with atomic numbers 93 and 94, respectively. The discovery of the elements, now discredited, was made by Enrico Fermi and a team of scientists at the University of Rome in 1934.
Bahasa Indonesia; Interlingua; ... Transuranium elements – Elements with atomic number greater than 92. Valve metal - a metal which, in an electrolytic cell, ...