Sentence examples for berkelium from inspiring English sources
noun
A transuranic chemical element (symbol Bk) with an atomic number of 97.
All berkelium isotopes are radioactive; berkelium-247 is the longest-lived (1,400-year 1,400-year.
The titanium atoms must be travelling fast enough in GSI's particle accelerator to overcome the repulsion between their protons and those of the berkelium, yet slowly enough to avoid ripping the newly formed atom of element 119 apart before it has had time to settle down.
And that is precisely what Dr Düllmann intends to do in the case of element 119, by firing titanium atoms (number 22) at those of berkelium (97) and hoping some of them merge.Making a new element is tricky.
Metallic californium has been prepared and is structurally similar to metallic americium, curium, berkelium, and most lanthanoid metals.
The other new elements discovered by Seaborg were americium (95), curium (96), berkelium (97), californium (98), einsteinium (99), fermium (100), mendelevium (101), nobelium (102), and seaborgium (106).
Metallic berkelium has been prepared; it is electropositive, reactive, and silver-coloured like the other actinoid metals, with a specific gravity of 14.8.
Tracer chemical investigations have shown that berkelium exists in aqueous solutions in the +3 and +4 oxidation states, presumably as Bk3+ and Bk4+ ions.
Berkelium-249 (314-day half-life) has been widely used in the chemical studies of the element because it can be produced in weighable amounts that are isotopically pure by nuclear reactions beginning with curium-244.
All californium isotopes are radioactive; the long-lived isotopes are produced from berkelium-249 or from californium-249.
To produce nuclei of the elusive superheavy element, an international team led by Yury Oganessian of the Joint Institute for Nuclear Research in Dubna, Russia, fired beams of calcium-48 ions at a target of radioactive berkelium-249 nuclei.
In 2010 Russian and American scientists announced the production of six atoms of element 117, which were formed when 22 milligrams of berkelium-249 were bombarded with atoms of calcium-48, at the cyclotron at the Joint Institute for Nuclear Research in Dubna, Russia.
