First discovered in rocks in the United States by Harris and Hopkins, and then independently in Ital
First discovered in rocks in the United States by Harris and Hopkins, and then independently in Italy by Rolla and Fernando, this radioactive metal was synthesized in 1941. It was only positively identified in 1945 at Oak Ridge by Marinsky, and even today, its 18-year lifespan makes it rare enough that it is, for the most part, used for small batteries. For 10 points, identify this lanthanide, named for the titan who stole fire.
First discovered in rocks in the United States by Harris and Hopkins, and then independently in Italy by Rolla and Fernando, this radioactive metal was synthesized in 1941.
prometheum