| equal the mass of the p… | 0.36 |
| equal one tenth of an o… | 0.33 |
| become infinite | 0.25 |
| equal the mass of the r… | 0.25 |
| take up space | 0.25 |
| converted into energy | 0.62 |
| conserved | 0.59 |
| created | 0.52 |
| concentrated in the nuc… | 0.49 |
| measured in kilogram | 0.39 |
| expressed in atomic mas… | 0.35 |
| produced | 0.33 |
| lost | 0.30 |
| added | 0.25 |
| destroyed in a chemical… | 0.25 |