This created berkelium-243 and two free neutrons. p1472; 4e. Berkelium is pronounced as BURK-lee-em. It was discovered in 1949 by Stanley Thompson, Albert Ghiorso and Glenn Seaborg. He died on February 25, 1999 in Lafayette, California. ". It was produced by cyclotron bombardment of milligram amounts of 241Am with helium ions at the Berkeley Radiation Laboratory. Berkelium's most stable isotope, berkelium-247, has a half-life of about 1,380 years. For online linking, please copy and paste one of the following: To cite this page in an academic document, please use the following MLA compliant citation: The only thing I would ask is an example of how you would like to be cited in APA format. What made berkelium hard to synthesize for the chemists was that it was difficult to separate from its final products, and a sufficient amount of americium, another rare element, should also be present in the synthesis. Uses of Berkelium. What is the color of Berkelium? Retrieved Oct. 15, 2012, from http://www.chemicool.com/elements/berkelium.html, Actinium – Aluminum – Americium – Antimony – Argon – Arsenic – Astatine, Barium – Berkelium – Beryllium – Bismuth – Bohrium – Boron – Bromine, Cadmium – Calcium – Californium – Carbon – Cerium – Cesium – Chlorine – Chromium – Cobalt – Copernicium – Copper – Curium, Darmstadtium – Dubnium – Dysprosium – Einsteinium – Erbium – Europium, Fermium – Flerovium – Fluorine – Francium – Gadolinium – Gallium – Germanium – Gold, Hafnium – Hassium – Helium – Holmium – Hydrogen – Indium – Iodine – Iridium – Iron, Krypton – Lanthanum – Lawrencium – Lead – Lithium – Livermorium – Lutetium, Magnesium – Manganese – Meitnerium – Mendelevium – Mercury – Molybdenum – Moscovium, Neodymium – Neon – Neptunium – Nickel – Nihonium – Niobium – Nitrogen – Nobelium – Oganesson – Osmium – Oxygen, Palladium – Phosphorus – Platinum – Plutonium – Polonium – Potassium – Praseodymium – Promethium – Protactinium, Radium – Radon – Rhenium – Rhodium – Roentgenium – Rubidium – Ruthenium – Rutherfordium, Samarium – Scandium – Seaborgium – Selenium – Silicon – Silver – Sodium – Strontium – Sulfur, Tantalum – Technetium – Tellurium – Tennessine – Terbium – Thallium – Thorium – Thulium – Tin – Titanium – Tungsten, Uranium – Vanadium – Xenon – Ytterbium – Yttrium – Zinc – Zirconium, Copyright © 2020 chemicool.com Aerial View of the High Flux Isotope Reactor at Oak Ridge National Laboratory where berkelium has been produced. Do radioactive elements cause water to heat up? Berkelium (Bk), synthetic chemical element of the actinoid series of the periodic table, atomic number 97. http://www.chemicool.com/elements/berkelium.html. The largest amount of berkelium ever produced was 22 milligrams, which was synthetically produced in more than 300 days, with 250 days being the irradiation process and 90 days being the purification process. It was the fifth transuranium discovered. It weighed just 3 billionth of a gram. Glenn T. Seaborg, Modern alchemy: selected papers of Glenn T. Seaborg.,World Scientific, 1994, page 789. Berkelium was first produced by Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr. and Albert Ghiorso working at the University of California, Berkeley, in December, 1949. Or are there better alternatives. Adjunct Professor, Department of Chemistry, University of Maryland, College Park, Maryland.