Pm+-+Promethium

Deran media type="custom" key="3199590" Name:Promethium Symbol:Pm Atomic Number:61 Atomic Mass:145 Standard State: 298 Group name:lanthonoid Period in Periodic Table: 6 (lanthonoid) Color:mattalic Classification: mattalic

When handling promethium you have to handle it carfully because it is radio active. Promethium in the dark glow with a bluish greenish glow.it glows like that because of the radioactivitey. Prothium is a rare earth meatal. They think that Promethium is not in the earths crust. Little is known about the element Prothium.