Name Krypton
Symbol Kr
Atomic Number 36
Atomic Mass 83.8 atomic mass units
Number of Protons 36
Number of Neutrons 48
Number of Electrons 36
Melting Point -157.2 C
Boiling Point -153.4 C
Density 3.74 grams per cubic centimeter
Normal Phase Gas
Family Noble Gas
Period 4
Cost $33.00 for 100 grams



Origin of Name From the Greek word kryptos, meaning hidden
Date and Place of Discovery In May 1898 in England
Discovered by Sir William Ramsey and Morris W. Travers
Common Compounds
Interesting facts
  • It is found free in nature.
  • It is produced when air is purified, compressed, cooled, distilled and condensed.
  • It is usually mixed with a halogen (usually fluorine) when used in lasers.
Common Uses
  • Lighting
  • Lasers
  • Laboratory research
  • Medical imaging


Photo Courtesy of
Chemical Elements. com
Chemicool. com
Jefferson Lab

Krypton Atomic Structure Elements by Name Elements by Number Home