Krypton

Krypton (Kr)

Atomic Number: 36
Atomic Weight: 83.80
Melting Point: -156.6
Boiling Point: -152.3
Specific Gravity: n/a
Valence(s): 0
Krypton was discovered by Ramsay and Travers in 1898. Krypton is rare, present in the air in only minute quantities. Separating krypton from liquid air is difficult; consequently, the high cost of krypton limits its uses. It is used for filling various fluorescent and incandescent lighting devices. Its name comes from "kryptos", which is Greek for hidden. [LM] {RW}