Praseodynium

Symbol

Pr

Atomic number

59

Atomic mass	140.907		Thermal conductivity	0.125
Atomic radius	2.67		Covalent radius	1.65
Density	6.5		Atomic volume	20.8
Melting point	1204		Oxidation states	3,4
Boiling point	3785		Stable isotopes	1
Heat of vapor.	296.8		Electronegativity	1.13
Heat of fusion	6.89		First ionization	5.46
Specific heat	0.19		Electrical conduct.	...

Electron configuration

Praseodynium

As a member of the fourteen member lanthanide series, this element has few properties which distinguish it from the other members of the series. All of them along with lanthanum, yttrium, and scandium occur in very small quantities in nature. The usual source is the mineral monazite, or monazite sand, which is a mixture of phosphates containing also some thorium phosphate.

Praseodynium Nuclear Data