Stable isotope Praseodymium (Pr)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Nuclear Spin
Pr-141 59 82 140.907648 100.00% 5/2+

Properties of Praseodymium

Name Praseodymium
Symbol Pr
Atomic number 59
Atomic weight 140.9077
Standard state Solid at 298° K
CAS Registry ID 7440-10-0
Group in periodic table N/A
Group name Lanthanoid
Period in periodic table 6 (Lanthanoid)
Block in periodic table f-block
Color Silvery white, yellowish tinge
Classification Metallic
Melting point 931 °C
Boiling point 3512 °C
Vaporization point 3510 ºC
Thermal conductivity 12.5 W/(m·K) at 298.2 °K
Electrical resistivity 68 µΩ·cm at 25 °C
Electronegativity 1.1
Heat of vaporization 330 kJ·mol-1 at 3512 °C
Heat of fusion 6.9 kJ·mol-1
Density of liquid 6.50 g/cm3 at 931 °C
Density of solid 6.77 g/cm3
Electron configuration [Xe]4f36s2
Atomic radius 1.828 Å
First ionization potential 5.46 eV
Oxidation states +2, +3, +4
Most stable oxidation state +3