| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In the early 1900s the "plum pudding" model for the internal structure of these was replaced by the planetary model | the atom | $2,000 | DJ | PHYSICS | 2023-07-26 | #8923 | |
| The ancient Greek Democritus gave us this word meaning "something that can't be cut" | atom | $400 | DJ | NUCLEAR PHYSICS | 1985-12-24 | #337 | |
| With 92 protons, 146 neutrons, & 92 electrons, it's the heaviest atom found in nature | the uranium atom | $600 | DJ | NUCLEAR PHYSICS | 1985-05-08 | #173 |