Pm Promethium     Atomic number : 61 
    Relative atomic mass (12C = 12.0000) :  144.9127 (Pm-145) 
    P H Y S I C A L     D A T A
Group 3 lanthanide
Density / kg m-3 :  7220 [298 K]
Melting point / K :  1441 
Boiling point / K :  c. 3000
    D I S C O V E R Y
Promethium was produced in 1945 by J.A. Marinksy, L.E. Glendenin and C.D. Coryell at Oak Bridge, Tennessee, USA.
    G E O L O G I C A L     D A T A
Sun (relative to H = 1 × 1012) : n.a.
Earth's crust / p.p.m. : traces in uranium ores
Seawater / p.p.m. : nil
    B I O L O G I C A L     D A T A
Level in humans
Organs: nil
Daily dietary intake : nil
Total mass of element
in average (70 kg) person :


NetElements II  

A portrait of promethium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.

Text copyright John Emsley 1999.   HTML and page layout copyright Simon Hall 1999.
Unauthorised reproduction of any aspect of this site is strictly prohibited.
NetElements II last modified October 27th, 1999