Periodic Table of the Elements: Selenium
Related article: Periodic Table of the Elements (table)Periodic Table of the Elements
(showing atomic number and atomic symbol; click on atomic symbol for more detailed information)
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| Atomic Number: | 34 |
| Atomic Symbol: | Se |
| Seleniumselenium , nonmetallic chemical element; symbol Se; at. no. 34; at. wt. 78.96; m.p. 217°C;; b.p. about 685°C;; sp. gr. 4.81 at 20°C;; valence −2, +4, or +6. Selenium is directly below sulfur in Group 16 of the periodic table. ..... Click the link for more information. | |
| Atomic Weight: | 78.96 |
| Electron Configuration: | 2 · 8 · 18 · 6 |