When was berkelium discovered and by whom?
Berkelium was discovered in December 1949 by a team at the Lawrence Berkeley National Laboratory led by Glenn T. Seaborg, Albert Ghiorso, Stanley Gerald Thompson, and Kenneth Street Jr.
Common questions about Berkelium
Short answers, pulled from the story.
How much berkelium has the United States produced since 1967?
Since 1967, the United States has produced just over one gram of berkelium-249, with the majority generated at the Oak Ridge National Laboratory in Tennessee.
What is the half-life of berkelium-249?
Berkelium-249 has a half-life of 330 days, meaning that half of any sample decays into californium-249 every year.
What color does berkelium appear in aqueous solutions?
Berkelium ions display a striking green color in aqueous solutions, which shifts to yellow in hydrochloric acid and orange-yellow in sulfuric acid.
When was berkelocene synthesized and how much berkelium was used?
Chemists synthesized berkelocene in 2025 using 0.3 milligrams of berkelium to create a stable trigonal metallocene complex.
How much berkelium-249 is allowed in the human skeleton?
The maximum permissible amount of berkelium-249 in the human skeleton is 0.4 nanograms, a limit that underscores the extreme caution required when working with the element.