Krypton Electron Configuration
Krypton (Kr) · 36 electrons · Noble gas
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6
Noble gas notation: [Ar] 3d10 4s2 4p6
Orbital diagram
↑↓
1s↑↓
2s↑↓↑↓↑↓
2p↑↓
3s↑↓↑↓↑↓
3p↑↓↑↓↑↓↑↓↑↓
3d↑↓
4s↑↓↑↓↑↓
4p- Valence electrons
- 8
- Unpaired electrons
- 0
- Block
- p-block
- Magnetism (atom)
- diamagnetic
Electrons per shell
| K (n = 1) | 2 |
|---|---|
| L (n = 2) | 8 |
| M (n = 3) | 18 |
| N (n = 4) | 8 |
How to write it
Place 36 electrons into subshells in the Aufbau order (1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p), filling s with 2, p with 6, d with 10 and f with 14. Krypton sits in period 4, group 18, in the p-block, so its last electron enters a p subshell. Replacing the inner electrons with the previous noble gas gives the shorthand [Ar] 3d10 4s2 4p6.
Try krypton and its ions in the calculator, or see the full krypton data sheet.
Krypton electron configuration FAQ
What is the electron configuration of krypton?
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶. Shorthand (noble gas) notation: [Ar] 3d¹⁰ 4s² 4p⁶.
What is the noble gas configuration of krypton?
[Ar] 3d¹⁰ 4s² 4p⁶. The bracket stands for the Ar core electrons.
How many valence electrons does krypton have?
8 (full outer shell).
How many unpaired electrons does krypton have?
0 in the ground state, following Hund’s rule. With all electrons paired, the atom is diamagnetic.