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The Noble Gases

Group 18 of the periodic table - the famously unreactive elements.

Z	Symbol	Element	Note
2	He	Helium	Lifts balloons and airships; coolant for MRI superconducting magnets.
10	Ne	Neon	Glows red-orange in 'neon' signs and high-voltage discharge tubes.
18	Ar	Argon	Most abundant noble gas in air; inert shielding for welding.
36	Kr	Krypton	Used in high-performance lighting and once defined the metre.
54	Xe	Xenon	Powers bright flash lamps and serves as a general anesthetic.
86	Rn	Radon	Radioactive; a decay product of radium and a household health hazard.

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