Superactinides
The superactinides are elements with atomic numbers 121(unbiunnium(Ubu)) to 153(unpenttrium(Upt)).[1] They are the furthest group in the Periodic table. As of 2024, none has been found. Scientists think they must have half-lives of only nanoseconds. The elements in this block are considered to be as g-block elements.
References
[change | change source]- ↑ Christopher McFadden (April 18, 2018). "How the Periodic Table Came Together: The History of Science's Great Map". Archived from the original on November 11, 2021. Retrieved November 10, 2021.