36 Kr
Noble gas
Krypton
Used in high-performance lighting.
Properties of Krypton
- Atomic number (Z)
- 36
- Symbol
- Kr
- Atomic mass
- 83.798 g/mol
- Category
- Noble gas
- Group
- 18
- Period
- 4
- Electron configuration
- [Ar] 3d¹⁰ 4s² 4p⁶
- Electronegativity (Pauling)
- 3
- Atomic radius
- 88 pm
- First ionization energy
- 1351 kJ/mol
- Melting point
- 115.79 K (-157.4 °C)
- Boiling point
- 119.93 K (-153.2 °C)
- Density
- 0.003733 g/cm³
- Phase at 25 °C
- Gas
- Discovered
- Discovered in 1898
Frequently asked questions
What is Krypton?
Krypton (Kr) is a noble gas, element number 36 on the periodic table. Used in high-performance lighting.
What is the atomic number and atomic mass of Krypton?
Krypton has atomic number 36 and an atomic mass of about 83.798 g/mol.
What is the electron configuration of Krypton?
The electron configuration of Krypton is [Ar] 3d¹⁰ 4s² 4p⁶.
Where is Krypton on the periodic table?
Krypton sits in group 18, period 4, and is classified as a noble gas.