| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| This positively charged nuclear particle has almost 2,000 times the mass of the negatively charged electron | a proton | $800 | DJ | PHYSICS | 2007-06-20 | #5258 | |
| Every element has at least 1 of these nucleons; in fact, ordinary hydrogen has only 1 | a proton | $800 | DJ | PHYSICS | 1994-03-07 | #2196 | |
| Stable subatomic particle whose name is from the Greek for first | a proton | $300 | J | NUCLEAR PHYSICS | 1991-04-22 | #1541 |