36Gas
Kr 83.798 Atomic mass · uNoble gases
Krypton
Krypton (from Greek:κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 (noble gases) elements. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionally distilling liquefied air, and is often used with other rare gases in fluorescent lamps.
Discovery 1898 (William Ramsay)
K2L8M18N8
Physical properties
Values for the element in its standard state.
- Density
- 0.00375g/cm³
- Melting point
- 116K
- Boiling point
- 120K
- Atomic radius
- 110pm
- Bonding type
- Atomic
- Molar heat
- Not available
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons;
[Ar] represents 18 core electrons. The full view shows them explicitly.
36 electrons Orbital order preserved from source
- Electronegativity
- 3Pauling scale
- First ionization energy
- 1,351kJ/mol
- Electron affinity
- 0kJ/mol
- Van der Waals radius
- 202pm
Kr KryptonAtomic number 36
1,351kJ/mol
Atomic numberGaps indicate unavailable data
About krypton
- Appearance
- Colorless gas, exhibiting a whitish glow in a high electric field
- Discovery
- 1898 (William Ramsay)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.