Aufbau Principle
Principle
Electrons are added to the lowest energy orbital available
Figure
| n=2 | n=6 | n=10 | n=14 |
|---|---|---|---|
| 1s | |||
| 2s | 2p | ||
| 3s | 3p | 3d | |
| 4s | 4p | 4d | 4f |
| 5s | 5p | 5d | 5f |
| 6s | 6p | 6d | 6f |
| 7s | 7p | 7d | 7f |
| n | Fill sequence | Electrons |
|---|---|---|
| n=1 | 2 | |
| n=2 | 8 | |
| n=3 | 18 | |
| n=4 | 32 |
Order of filling
Probably a good idea to memorize
Energy
should be placed in the lowest energy orbitals possible - "n" value is the general indicator of energy