| He was distinguished, also, as an oculist and aurist, and removed a particle of iron from the cornea by means of a magnet. |
| However, as a subatomic particle the electron is also a quantum-mechanical object. |
| Every particle of food must be aerated in the lungs before it can be assimilated. |
| According to quantum theory, the state of a particle is described as its wave function. |
| Ionium expels an alpha particle and becomes radium, which is a bivalent element resembling barium belonging to the second group. |
| This stopping power of an atom for an alpha particle is approximately proportional to the square root of its atomic weight. |
