| Answer | Crossword Clue |
|---|---|
| radiothorium | a radioactive isotope of thorium with the mass number 228 |
| Answer | Crossword Clue |
|---|---|
| radiothorium | a radioactive isotope of thorium with the mass number 228 |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.