Periodic Table of the Elements: Tantalum
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| Atomic Number: | 73 |
| Atomic Symbol: | Ta |
| Tantalumtantalum [from Tantalus], metallic chemical element; symbol Ta; at. no. 73; at. wt. 180.94788; m.p. 2,996°C;; b.p. 5,400±100°C;; sp. gr. 16.65 at 20°C;; valence +2, +3, +4, or +5. ..... Click the link for more information. | |
| Atomic Weight: | 180.94788 |
| Electron Configuration: | 2 · 8 · 18 32 · 11 · 2 |