Skip links

Seaborgium (Sg): Fun Facts and Information About the Element

What is the symbol? Sg
What is the atomic number? 106
What is the atomic weight? 266
What year was it discovered? 1974
Who discovered the element? Albert Ghiorso et. al.
What group is the element in? 6
What element category is it in? Transition Elements

Where is Seaborgium Found?

In September 1974, workers of the Lawrence Berkeley and Livermore Laboratories also claimed creation Element 106 “without any scientific doubt.” The LBL and LLL Group used the Super HILAC to accelerate 18O ions onto a 249Cf target.

Element 106 was created by the reaction 249Cf(18O, 4N)263X, which decayed by alpha emission to rutherfordium, and then by alpha emission to nobelium, which in turn further decayed by alpha between daughter and granddaughter. The element so identified had alpha energies of 9.06 and 9.25 MeV with a half-life of 0.9 +/- 0.2 s.