Noble Gases

Running standalone

Group 18: the gases with full outer shells. Pick one to explore it.

Ne

Neon

[He] 2s² 2p⁶

Atomic number
10
Atomic mass
20.18
Electrons per shell
2 · 8
Boiling point
-246 °C
Density
0.9 g/L
Discovered
1898 (Ramsay and Travers)

Glows red-orange when a current passes through it; other “neon” colours use other gases.

Uses

  • Neon signs
  • Helium–neon lasers
  • High-voltage indicators

Boiling point down the group

  1. He-268.9 °C
  2. Ne-246 °C
  3. Ar-185.8 °C
  4. Kr-153.4 °C
  5. Xe-108.1 °C
  6. Rn-61.7 °C

Open this app inside the study assistant to ask questions about it.