01 About Krypton
Used to define the metre from 1960โ1983 (one metre = 1,650,763.73 wavelengths of krypton-86 orange-red light). Superman's fictional weakness is named after it.
02 Physical Properties
State at room temperature๐จ Gas
Melting point-157.4 ยฐC
Boiling point-153.2 ยฐC
Density0.00374 g/cmยณ
Atomic mass83.798 u
Electron configuration2,8,18,8
Period / GroupPeriod 4, Group 18
BlockP-block
03 Discovery
Krypton was discovered in 1898 by Ramsay/Travers.