| But at the subatomic level, quantum mechanics has proven to be an indispensable tool in predicting often strange processes. |
| Neutron stars are the most dense objects of normal matter in the universe, supported against gravitational collapse by subatomic forces. |
| However, as a subatomic particle the electron is also a quantum-mechanical object. |
| To study subatomic particles, physicists build giant accelerators that smash the particles together. |
| Research into the atom's nucleus has uncovered a variety of subatomic particles, including quarks and gluons. |
| Note that subatomic particles sometimes have antiparticles, with opposite charge and spin, that are the same ones going backwards in time. |
