36
Kr
83.798
Krypton (Kr)
Element 36 · Period 4 · Group 18
noble-gas
gas at room temp
p-block
About Krypton
Noble gas used in fluorescent lighting and high-powered lasers.
Physical Properties
Atomic Mass
83.798 u
State at 25°C
Gas
Melting Point
-157.37 °C
Boiling Point
-153.22 °C
Density
0.003733 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[Ar] 3d¹⁰ 4s² 4p⁶
Electron Shells
2, 8, 18, 8
Atomic Radius
88 pm
Ionization Energy
1351 kJ/mol
Oxidation States
0, +2
Discovery & History
Discovered By
William Ramsay
Discovery Year
1898
Named By
William Ramsay
Name origin: Greek: kryptos (hidden)
Frequently Asked Questions
- Is Krypton a metal, nonmetal, or metalloid?
- Krypton is classified as a noble-gas.
- What state is Krypton in at room temperature?
- Krypton is a gas at standard room temperature (25°C).
- What is the atomic mass of Krypton?
- Krypton has an atomic mass of 83.798 atomic mass units (u).
- Who discovered Krypton?
- Krypton was discovered by William Ramsay in 1898.
- Where is Krypton on the periodic table?
- Krypton is element number 36, located in period 4 and group 18.