Krypton (Kr)
Krypton
Krypton (Kr) is a noble gas in period 4, group 18. Its relative atomic mass is 83.798 and the molar mass of the atom is 83.798 g/mol.
Atomic number 36
Atomic mass 83.798
Molar mass 83.798 g/mol
Category Noble gas Gas
Properties of krypton
| Atomic number | 36 |
|---|---|
| Symbol | Kr |
| Latin name | Krypton |
| Relative atomic mass | 83.798 |
| Molar mass | 83.798 g/mol |
| Group, period, block | 18, 4, p |
| Category | Noble gas |
| State at 20 °C | Gas |
| Electron configuration | [Ar] 3d¹⁰ 4s² 4p⁶ |
| Electronegativity (Pauling) | 3 |
Electron configuration of krypton
Electrons per shell
K2L8M18N8
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶
Noble-gas notation
36 protons · 36 electrons[Ar] 3d¹⁰ 4s² 4p⁶
Formula and compounds of krypton
Simple substanceKrkryptonMolar mass of Kr: 83.798 g/mol
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Frequently asked questions
The relative atomic mass of krypton is 83.798, so the molar mass of the atom is 83.798 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶. Noble-gas notation: [Ar] 3d¹⁰ 4s² 4p⁶.