KRIPTON

The kriptón or krypton is a chemical element of the periodic table which symbol is Kr and his atomic number is 36. The kriptón is a rare gas inoloro and insipidly of few reactivity characterized by a green spectrum of lines and red very brilliant.
It is used in solitary or mixed by neon and argon in fluorescent lamps
The kriptón (of the Greek κρυπτόν I conceal secret) it was discovered in 1898 by William Ramsay and Morris Travers in a residue of the evaporation of the solid air.
In the atmosphere of the planet Mars has been a content of 0,3 ppm of kriptón.
Information obtained of www.wikipedia.org