No. 02 of 12 · Common Chemical Elements
Helium
Chemical element with atomic number 2 (He)
- Type
- chemical element · atmophile element · Source · 2026-10-20
- Chemical formula
- He · Source · 2026-10-20
- Physical state
- Unknown
- Density
- 0.1785 kilogram per cubic metre · Source · 2026-10-20
- Source
- https://commons.wikimedia.org/wiki/File:Helium_discharge_tube.jpg
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