A type of molecule motion which accumulates the energy.
Table summary for Molecular freedom degrees of N- atomic molecules:
| Monatomic | Linear molecules | Non-linear molecules | |
|---|---|---|---|
| Translation (x, y, and z) | 3 | 3 | 3 |
| Rotation (x, y, and z) | 0 | 2 | 3 |
| Vibration | 0 | 3N − 5 | 3N − 6 |
| Total | 3 | 3N | 3N |