Show Elements
ID 32
Symbol Pr
Name Promethium
Density (g/cm<sup>3</sup>) 7.26
Atomic Number 61
Molecular Weight 145
Melting Point (K) 1373
Boiling Point (K) 3273
Specific Heat Capacity (J/kg K)
Electro Negativity 1.13
Curie temperature (K)
Bohr Magneton (J/T)
Magnetization Saturation (MA m<sup>-1</sup>)
Crystal Structure Double hexagonal close-packed (dhcp)
Appearance Silver
Element category Lanthanide
Magnetic ordering Paramagnetic
Discovery Chien Shiung Wu, Emilio Segrè, Hans Bethe (1945)
General Information Promethium is a rare-earth metal that emits beta radius. It is very radoiactive and rare, so it is little studied: its chemical and physical properties are not well defined. Promethium salts have a pink or red colour.
Image source
General informations source