An artificially produced radioactive element with atomic number 106 that has only been produced in trace amounts. The isotope with mass number 266 has the longest confirmed half-life (21 seconds), although heavier isotopes with longer half-lives have been reported.
A radioactive chemical element with a very short half-life: a transactinide produced by bombarding californium or lead with high-energy nuclear particles: symbol, Sg; at. no. 106
A synthetic, radioactive element that is produced by bombarding californium with oxygen ions or bombarding lead with chromium ions. Its most long-lived isotopes have mass numbers 259, 261, 263, 265, and 266 with half-lives of 0.9, 0.23, 0.8, 16, and 20 seconds, respectively. Atomic number 106.
Origin of seaborgium
- After Glenn Theodore Seaborg
From American Heritage Dictionary of the English Language, 5th Edition
- Named for Glenn T. Seaborg.