Periodic Table of the Elements: Helium
Related article: Periodic Table of the Elements (table)Periodic Table of the Elements
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| Atomic Number: | 2 |
| Atomic Symbol: | He |
| Heliumhelium , gaseous chemical element; symbol He; at. no. 2; at. wt. 4.0026; m.p. below −272°C; at 26 atmospheres pressure; b.p. −268.934°C; at 1 atmosphere pressure; density 0.1785 grams per liter at STP; valence usually 0. ..... Click the link for more information. | |
| Atomic Weight: | 4.0026 |
| Electron Configuration: | 2 |