(pm) prometyum

listen to the pronunciation of (pm) prometyum
التركية - الإنجليزية
(Nükleer Bilimler) promethium
a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
{i} rare metallic element (Chemistry)
a metallic chemical element (symbol Pm) with an atomic number of 61