Discovered
1868Density
1.79×10-4 g/cm3Melts
-272.20 °C
- -457.96 °F
- 0.95 °K
Boils
-268.95 °C
- -452.12 °F
- 4.20 °K
Contributed by Ea Nasir
Ampoule of Helium in a bottle
Contributed by collector no. 3
The Noble Gas group, in ampoules. There's not much to see here. From left to right: Helium , Neon , Argon , Krypton , Xenon .
Contributed by collector no. 4
Helium gas in an ampoule with a high voltage source next to it, which causes a beautiful pink and white glow. This is similar to how Neon lamps work.
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