This element was discovered, in 1974, at the Lawrence Berkeley Laboratory in University of Berkeley, California, USA, by Albert Ghiorso and his co-workers.
This element was first prepared in experiments performed both by the Soviet Joint Institute for Nuclear Research and the Berkeley team. The Russian experiments involved the bombardment of lead isotopes with Cr 54 ions while the American performed the collision of O 18 ions with Cf 249 ions. However, it was not until 1993 that its existence was confirmed by the American university.
It was named Seaborgium (Sg) in honor of Glenn T. Seaborg, an American chemist who was co-discoverer of 11 artificial elements and Nobel prize winner.
See also: Properties: Isotopes