1.1. Krypton is a chemical element with symbol Kr and atomic number 36.
2. Physical characteristics
2.1. colourless
2.2. odourless
2.3. tasteless
2.4. occurs in small amounts
2.5. Phase (at STP) gas
2.6. Melting point 115.78 K (−157.37 °C, −251.27 °F)
2.7. Boiling point 119.93 K (−153.415 °C, −244.147 °F)
2.8. Density (at STP) 3.749 g/L
3. Atomic model of krypton
4. electronic configuration
4.1. 2, 8, 18, 8
5. discovery & history
5.1. Krypton was discovered in Britain in 1898 by Sir William Ramsay, a Scottish chemist, and Morris Travers, an English chemist, in residue left from evaporating nearly all components of liquid air.
6. use
6.1. Krypton is used in some photographic flashes for high speed photography
7. unique characteristics
7.1. It has a full outer shell of electrons, rendering it largely inert to reactions with other elements. However, krypton does make some compounds.
