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Basic Information
Name: Niobium
Symbol: Nb
Atomic Number: 41
Atomic Mass: 92.90638 amu
Melting Point: 2468.0 °C (2741.15 °K, 4474.4 °F)
Boiling Point: 4927.0 °C (5200.15 °K, 8900.6 °F)
Number of Protons/Electrons: 41
Number of Neutrons: 52
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 8.57 g/cm3
Color: white
Atomic Structure
![[Bohr Model of Niobium]](Chemical Elements_com - Niobium (Nb)_files/b0041.gif) |
Number of Energy Levels: 5 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 18 Fourth Energy Level: 12 Fifth Energy Level: 1 |
Isotopes
| Isotope | Half Life |
| Nb-90 | 14.6 hours |
| Nb-91 | 700.0 years |
| Nb-91m | 62.0 days |
| Nb-92 | 3.6E7 years |
| Nb-92m | 10.13 days |
| Nb-93 | Stable |
| Nb-93m | 16.1 years |
| Nb-94 | 20000.0 years |
| Nb-94m | 6.26 minutes |
| Nb-95 | 34.97 days |
| Nb-95m | 3.61 days |
| Nb-96 | 23.4 hours |
| Nb-97 | 1.23 hours |
| Nb-97m | 58.1 seconds |
Facts
Date of Discovery: 1801
Discoverer: Charles Hatchet
Name Origin: After Niobe, daughter of mythical king (Tantalus)
Uses: No uses known
Obtained From: columbite