Seaborgium

Radioactive and Artificially Produced Seaborgium was first produced by a team of scientists led by Albert Ghiorso working at the Lawrence Berkeley Laboratory in Berkeley, California, in 1974. They created seaborgium by bombarding atoms of californium-249 with ions of oxygen-18 using a machine called the Super-Heavy Ion Linear Accelerator. The collision produced atoms of seaborgium-263 and four free neutrons. Seaborgium-263 is an isotope of seaborgium with a half-life of about 1 second. Three months before the Berkeley group announced their discovery, a team of scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, claimed to have produced seaborgium. Their method involved bombarding atoms of lead-207 and lead-208 with ions of chromium-54 with a device called a cyclotron. They believed that they had produced atoms of seaborgium-259. The Berkeley group's work was confirmed in 1993 and they were credited with the discovery. Seaborgium's most stable isotope, seaborgium-271, has a half-life of about 1.9 minutes. It decays into rutherfordium-267 through alpha decay or decays through spontaneous fission.. Since only a few atoms of seaborgium have ever been made, there are currently no uses for seaborgium outside of basic scientific research.
 * Atomic Number:** 106
 * Atomic Weight:** 271
 * Melting Point:** Unknown
 * Boiling Point:** Unknown
 * Density:** Unknown
 * Phase at Room Temperature:** Solid
 * Element Classification:** Metal
 * Period Number:** 7 **Group Number:** 6 **Group Name:** none
 * What's in a name?** Named after the scientist Glenn Seaborg.
 * Say what?** Seaborgium is pronounced as **see-BORG-ee-em**.
 * History and Uses:**
 * Estimated Crustal Abundance:** Not Applicable
 * Estimated Oceanic Abundance:** Not Applicable
 * Number of Stable Isotopes:** 0
 * Ionization Energy:** Unknown
 * Oxidation State:** Unknown

Harmful effects: Seaborgium is harmful due to its radioactivity. Characteristics: Seaborgium is a radioactive synthetic metal and has only been produced in tiny amounts.

Uses of Seaborgium
Seaborgium is of research interest only.

Extrapolated properties
Oxidation states Seaborgium is projected to be the third member of the 6d series of transition metals and the heaviest member of group 6 in the Periodic Table, below[|chromium], [|molybdenum] and [|tungsten]. All the members of the group readily portray their group oxidation state of +6 and the state becomes more stable as the group is descended. Thus seaborgium is expected to form a stable +6 state. For this group, stable +5 and +4 states are well represented for the heavier members and the +3 state is known but reducing, except for chromium(III). Chemistry Much seaborgium chemical behavior is predicted by extrapolation from its lighter cogeners molybdenum and tungsten. Molybdenum and tungsten readily form stable trioxides MO3, so seaborgium should form SgO3. The oxides MO3 are soluble in alkali with the formation of oxyanions, so seaborgium should form a seaborgate ion, SgO42−. In addition, WO3 reacts with acid, suggesting similar amphotericity for SgO3. Molybdenum oxide, MoO3, also reacts with moisture to form a hydroxide MoO2(OH)2, so SgO2(OH)2 is also feasible. The heavier homologues readily form the volatile, reactive hexahalides MX6 (X=Cl,F). Only tungsten forms the unstable hexabromide, WBr6. Therefore, the compounds SgF6 and SgCl6 are predicted, and "eka-tungsten character" may show itself in increased stability of the hexabromide, SgBr6. These halides are unstable to oxygen and moisture and readily form volatile oxyhalides, MOX4 and MO2X2. Therefore SgOX4 (X=F,Cl) and SgO2X2 (X=F,Cl) should be possible. In aqueous solution, a variety of anionic oxyfluoro-complexes are formed with fluoride ion, examples being MOF5− and MO3F33−. Similar seaborgium complexes are expected.

Element 106, now known as seaborgium, was first created in 1974 at the Super HILAC accelerator at the Lawrence Berkeley Laboratory by a joint Lawrence Berkeley/Lawrence Livermore collaboration led by Albert Ghiorso and E. Kenneth Hulet.[1home] They produced the new nuclide 263Sg by bombarding a target of 249Cf with 18O ions. This nuclide decays by α emission with a half-life of 0.9 ± 0.2 sec.