61 Pm [145]

Promethium

Category: Lanthanide | State: Solid

Atomic Properties

Atomic Number 61
Atomic Mass [145]
Electronic Configuration [Xe] 4f⁵ 6s²

Periodic Table Placement

Group N/A
Period 6
Block f-block

Physical Properties & Discovery

Melting Point 1042°C
Boiling Point 3000°C (est)
Density 7.26 g/cm³
Discovered By J.A. Marinsky, L.E. Glendenin, C.D. Coryell (1945)

Frequently Asked Questions about Promethium