59
Pr
Praseodymium
140.90765 | 2
8
18
21
8
2
|
59
Pr
Praseodymium
140.90765 | 2
8
18
21
8
2
|
| General |
|---|
| Name | Praseodymium | | Symbol | Pr | | Number | 59 | | Chemical series | Lanthanides | | Group / Period | 0 / 6 | | Block | f-block | | CAS registry number | 7440-10-0 |
| Physical properties |
|---|
| State | solid | | Density | 6.77 g/cm3 | | Melting point | 1208 K (935 °C, 1715 °F) | | Boiling point | 3793 K (3520 °C, 6368 °F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 140.90765 g/mol | | Crystal structure | hexagonal | | Electronegativity | 1.13 | | Atomic radius | 185 pm | | Atomic radius (calculated) | 247 pm | | Electron configuration | [Xe] 4f3 6s2 | | Electrons per shell | 2, 8, 18, 21, 8, 2 | | Number of protons | 59 | | Number of neutrons | 82 |
|
Neodymium