| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| This property is measured in becquerels; one Bq equals one disintegration of an unstable nucleus per second | radioactivity | $800 | DJ | PHYSICS | 2022-05-19 | #8644 | |
| It's the property of some unstable atoms that causes them to give off ionizing radiation | radioactivity | $400 | DJ | PHYSICS | 2014-09-23 | #6902 |