Keywords: Berkelium.jpg en It took 250 days to make enough berkelium shown here in dissolved state to synthesize element 117 http //news sciencemag org/sciencenow/2010/04/finally-element-117-is-here html ORNL Department of Energy circa 2009 2010 PD-USGov Berkelium Ununseptium LicenseReview http //news sciencemag org/sciencenow/2010/04/finally-element-117-is-here html Shizhao 2016-01-05 |