Astatine Electron Configuration
Orbital diagram
- Valence electrons
- 7
- Unpaired electrons
- 1
- Block
- p-block
- Magnetism (atom)
- paramagnetic
Electrons per shell
| K (n = 1) | 2 |
|---|---|
| L (n = 2) | 8 |
| M (n = 3) | 18 |
| N (n = 4) | 32 |
| O (n = 5) | 18 |
| P (n = 6) | 7 |
Astatine ion configurations
| Ion | Electrons | Configuration |
|---|---|---|
| At− | 86 | [Xe] 4f14 5d10 6s2 6p6 |
How to write it
Place 85 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. Astatine sits in period 6, group 17, in the p-block, so its last electron enters a p subshell. Replacing the inner electrons with the previous noble gas gives the shorthand [Xe] 4f14 5d10 6s2 6p5.
Try astatine and its ions in the calculator, or see the full astatine data sheet.
Astatine electron configuration FAQ
What is the electron configuration of astatine?
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁵. Shorthand (noble gas) notation: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵.
What is the noble gas configuration of astatine?
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵. The bracket stands for the Xe core electrons.
How many valence electrons does astatine have?
7 (outer shell (n = 6)).
How many unpaired electrons does astatine have?
1 in the ground state, following Hund’s rule. An atom with unpaired electrons is paramagnetic.
What is the electron configuration of At−?
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ (86 electrons).