41
Nb
Niobium
92.90638 | 2
8
18
12
1
|
41
Nb
Niobium
92.90638 | 2
8
18
12
1
|
| General |
|---|
| Name | Niobium | | Symbol | Nb | | Number | 41 | | Chemical series | Transition elements | | Group / Period | 5 / 5 | | Block | d-block | | CAS registry number | 7440-03-1 |
| Physical properties |
|---|
| State | solid | | Density | 8.57 g/cm3 | | Melting point | 2750 K (2477°C, 4491°F) | | Boiling point | 5017 K (4744 °C, 8571 °F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 92.90638 g/mol | | Crystal structure | cubic body centered | | Electronegativity | 1.60 | | Atomic radius | 145 pm | | Atomic radius (calculated) | 198 pm | | Electron configuration | [Kr] 4d4 5s1 | | Electrons per shell | 2, 8, 18, 12, 1 | | Number of protons | 41 | | Number of neutrons | 52 |
|
Molybdenum