59
Pr
praseodymium
140.91

General properties

Group
n/a
Period
period 6
Category
lanthanoids
Standard atomic weight
140.907 66(1)
Melting point
1208 K (935 °C)
Boiling point
3403 K (3130 °C)
Phase at STP
solid

Additional properties

Block
f-block
Electron configuration
[Xe] 4f³ 6s²
Electrons per shell
2, 8, 18, 21, 8, 2
Electronegativity
1.13
Density
6.77 g/cm³
Oxidation states
0, +1, +2, +3, +4, +5
CAS Number
7440-10-0