Periodic Table of the Elements: Barium
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| Atomic Number: | 56 |
| Atomic Symbol: | Ba |
| Bariumbarium [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725°C;; b.p. 1,640°C;; sp. gr. 3.5 at 20°C;; valence +2. Barium is a soft, silver-white, chemically active, poisonous metal with a face-centered cubic crystalline structure. ..... Click the link for more information. | |
| Atomic Weight: | 137.327 |
| Electron Configuration: | 2 · 8 · 18 18 · 8 · 2 |