The increasing order (lowest first) for the value of e/m (charge / mass) for
We know that,
| Particle | charge | Mass | Charge: Mass(in terms of |
| 0 | 0 | ||
| 2e | 0.5 | ||
| e | 1 | ||
| e | 1840 |
Therefore, the correct order of charge : mass Ratio is given as