Periodic Table of the Elements: Niobium
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| Atomic Number: | 41 |
| Atomic Symbol: | Nb |
| Niobiumniobium , metallic chemical element; symbol Nb; at. no. 41; at. wt. 92.90638; m.p. about 2,468°C;; b.p. 4,742°C;; sp. gr. 8.57 at 20°C;; valence +2, +3, +4, or +5. ..... Click the link for more information. | |
| Atomic Weight: | 92.90638 |
| Electron Configuration: | 2 · 8 · 18 12 · 1 |