Noble Gas
| Also Known As | Inert gases (historical), rare gases, Group 18 elements, Group VIII gases |
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What is Noble Gas?
Elements in Group 18 of the periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases have completely filled valence shells (except helium, with 2 electrons), making them very unreactive. Used in lighting, welding, and as inert atmospheres.
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Elements in Group 18 of the periodic table: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn). Noble gases have completely filled valence shells (except helium, with 2 electrons), making them very unreactive. Used in lighting, welding, and as inert atmospheres.
Noble gases are used as: inert atmospheres for reactive chemistry and metallurgy (Ar, N₂), cryogenic coolants (He at 4.2 K for superconducting magnets, liquid He for MRI), lighting (Ne in neon signs, Ar/Kr in incandescent bulbs, Xe in high-intensity lamps), medical anesthesia (Xe is an anaesthetic),…
Noble gases are asphyxiants — they displace oxygen in confined spaces, causing death from hypoxia without warning (no odour, no irritation). Cryogenic noble gas liquids (liquid He, liquid Ar) cause cryogenic burns and can cause oxygen-enriched atmospheres on evaporation. Radon (Rn-222) is a radioact…