DescriptionBerkelium.jpg English: It took 250 days to make enough berkelium, shown here (in dissolved state), to synthesize element 117. Date Taken on 8
rationale |Article = Berkelium |Description = A photomicrograph of the first isolated bulk (1.7 micrograms) sample of berkelium |Source = {{cite book|title=Advances
Creation of an unexpected plane of enhanced covalency in cerium(III) and berkelium(III) terpyridyl complexes. Nat Commun 12, 7230 (2021). doi:10.1038/s41467-021-27576-y