| Answer | Crossword Clue |
|---|---|
| MOL | Smallest particle of an elem. |
| MOL | Smallest unit of an elem. |
| ATOM | Smallest particle of an element. |
| atom | the smallest particle of an element |
| atoms | ATOM, the smallest particle of an element |
| isotone | a type of atom (the smallest particle of an element) |
| isotones | ISOTONE, a type of atom (the smallest particle of an element) |
