Helium (He)
Neon
(Ne)
Argon
(Ar)
Krypton (Kr)
Xenon (Xe)
Radon
(Rn)
| Element | Electron Configuration/Emission Spectrum | Common Compound(s)/Application(s) |
|---|---|---|
| 2 Helium (He) |
|
~/Balloons, Helium-Neon Laser (for Reading Bar Codes etc), Cooling (in Telescopes, Superconducting Magnets) |
| 10 Neon (Ne) |
|
~/Light Signs |
| 18 Argon (Ar) |
|
~/Incandescent Bulbs, Geiger Counter Probe |
| 36 Krypton (Kr) |
|
~/High-end Incandescent Bulbs |
| 54 Xenon (Xe) |
|
~/High-end Incandescent Bulbs, Projector Lamps, Strobe Lamps, Flashy Car Head Lamps |
| 86 Radon (Rn) |
|
Tumour treatment |