| Answer | Crossword Clue |
|---|---|
| PLUTONIUM | Radioactive element isolated in 1940. |
| POLONIUM | Radioactive element in pitchblende. |
| IONIUM | Radioactive element discovered in 1907. |
| ACTINIUM | Radioactive element that glows blue in the dark |
| Answer | Crossword Clue |
|---|---|
| PLUTONIUM | Radioactive element isolated in 1940. |
| POLONIUM | Radioactive element in pitchblende. |
| IONIUM | Radioactive element discovered in 1907. |
| ACTINIUM | Radioactive element that glows blue in the dark |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.