Noble Gas Colors
Do all of the Noble Gases glow a certain color when
electricity is moved through them?
Yes. Helium is red, neon is orange, krypton is purple, xenon is white, and
I don't know about radon. Radon is quite dangerous to handle, however, as
it is so intensely radioactive.
Richard E. Barrans Jr., Ph.D.
PG Research Foundation, Darien, Illinois
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Update: June 2012