promethium

• Elemento químico metálico, mole e de cor prateada, pertencente ao grupo das terras raras e sem isótopos estáveis; foi descoberto inicialmente na forma radioativa como produto da fissão do urânio.

A soft, silvery metallic element belonging to the rare earth group, which has no stable isotopes and was first discovered in a radioactive form as a fission product of uranium.

incontável

1. Chemical elementC2formalscientific

   A soft, silvery, radioactive metallic element of the lanthanide series, with no stable isotopes, first discovered as a fission product of uranium.

   Elemento químico

   • Promethium is used in some specialized atomic batteries.
   • The element promethium was first isolated in 1945.
   • Due to its radioactivity, promethium must be handled with care.