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  2. Transuranium element - Wikipedia

    en.wikipedia.org/wiki/Transuranium_element

    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.

  3. Nuclear transmutation - Wikipedia

    en.wikipedia.org/wiki/Nuclear_transmutation

    I, and transuranium elements as the targets for transmutation, with other fission products, activation products, and possibly reprocessed uranium remaining as waste. [21] Technetium-99 is also produced as a waste product in nuclear medicine from Technetium-99m , a nuclear isomer that decays to its ground state which has no further use.

  4. Synthetic element - Wikipedia

    en.wikipedia.org/wiki/Synthetic_element

    A synthetic element is one of 24 known chemical elements that do not occur naturally on Earth: they have been created by human manipulation of fundamental particles in a nuclear reactor, a particle accelerator, or the explosion of an atomic bomb; thus, they are called "synthetic", "artificial", or "man-made". The synthetic elements are those ...

  5. Superheavy element - Wikipedia

    en.wikipedia.org/wiki/Superheavy_element

    The superheavy elements are those beyond the actinides in the periodic table; the last actinide is lawrencium (atomic number 103). By definition, superheavy elements are also transuranium elements, i.e., having atomic numbers greater than that of uranium (92).

  6. William Houlder Zachariasen - Wikipedia

    en.wikipedia.org/wiki/William_Houlder_Zachariasen

    Zachariasen's X-ray diffraction analysis was an essential basis for experimental evidence that the transuranium elements formed a 5f series analogous to the 4f series of the rare-earth elements. His X-ray studies of the transuranium elements were essential for the development of the metallurgy of the transuranium elements, particularly ...

  7. Einsteinium - Wikipedia

    en.wikipedia.org/wiki/Einsteinium

    Einsteinium is the element with the highest atomic number which has been observed in macroscopic quantities in its pure form as einsteinium-253. [4] Like all synthetic transuranium elements, isotopes of einsteinium are very radioactive and are considered highly dangerous to health on ingestion. [5]

  8. Nine elements on periodic table have been discovered using ...

    www.aol.com/nine-elements-periodic-table...

    So, element 105 was named dubnium, and element 106 was named seaborgium. The elements were placed in the periodic table’s seventh row, which is above the row of lanthanides and the row of actinides.

  9. Fission products (by element) - Wikipedia

    en.wikipedia.org/wiki/Fission_products_(by_element)

    Barium is formed in large amounts by the fission process. A short-lived barium isotope was confused with radium by some early workers. They were bombarding uranium with neutrons in an attempt to form a new element. But instead they caused fission which generated a large amount of radioactivity in the target.