transplutonium elements造句

• In 1945, B . B . Cunningham obtained the first bulk chemical compound of a transplutonium element, namely americium hydroxide.
• Within the actinides, there are two overlapping groups : transuranium elements, which follow uranium in the periodic table and transplutonium elements, which follow plutonium.
• At present, there are two major methods of producing isotopes of transplutonium elements : irradiation of the lighter elements with either neutrons or accelerated charged particles.
• These positions were originally designed to be occupied by target rods used for the production of transplutonium elements; however, other experiments can be irradiated in any of these positions.
• I guess this re-opens the discussion, because all I can find on " islands of stability " concerns Seaborg's and other researchers'conjectures and experimental observations on the behavior of transplutonium elements.