| Answer | Crossword Clue |
|---|---|
| suboxide | the oxide of an element that contains the smallest proportion of oxygen |
| enriched | Increase the proportion of a particular isotope in (an element), esp. that of the fissile isotope U-235 in uranium so as to make it more powerful or explosive |
| enriching | Increase the proportion of a particular isotope in (an element), esp. that of the fissile isotope U-235 in uranium so as to make it more powerful or explosive |
| atoms | the smallest unit of an element having the properties of that element |
| atom | the smallest unit of an element having the properties of that element |
