| Answer | Crossword Clue |
|---|---|
| PHOTON | Particle with zero mass |
| NEUTRINO | Subatomic particle with a mass close to zero |
| NEUTRON | Zero charge particle |
| PION | Zero-spin particle |
| Answer | Crossword Clue |
|---|---|
| PHOTON | Particle with zero mass |
| NEUTRINO | Subatomic particle with a mass close to zero |
| NEUTRON | Zero charge particle |
| PION | Zero-spin particle |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.