Americium Electron Configuration
Orbital diagram
- Valence electrons
- 2
- Unpaired electrons
- 7
- Block
- f-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) | 25 |
| P (n = 6) | 8 |
| Q (n = 7) | 2 |
Americium ion configurations
| Ion | Electrons | Configuration |
|---|---|---|
| Am3+ | 92 | [Rn] 5f7 |
How to write it
Place 95 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. Americium sits in period 7, in the f-block, so its last electron enters a f subshell. Replacing the inner electrons with the previous noble gas gives the shorthand [Rn] 5f7 7s2.
Try americium and its ions in the calculator, or see the full americium data sheet.
Americium electron configuration FAQ
What is the electron configuration of americium?
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 5f⁷ 7s². Shorthand (noble gas) notation: [Rn] 5f⁷ 7s².
What is the noble gas configuration of americium?
[Rn] 5f⁷ 7s². The bracket stands for the Rn core electrons.
How many valence electrons does americium have?
2 (2 in the outer s subshell).
How many unpaired electrons does americium have?
7 in the ground state, following Hund’s rule. An atom with unpaired electrons is paramagnetic.
What is the electron configuration of Am3+?
[Rn] 5f⁷ (92 electrons).