| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| About 1869 Julius Lothar Meyer & Dmitry Mendeleyev came up with this chart separately | periodic table | $200 | DJ | CHEMISTRY | 1992-01-21 | #1707 | |
| On this famous chart, the vertical columns are groups & the horizontal rows, periods | the Periodic Table | $400 | J | THE ELEMENTS | 1988-06-02 | #879 | |
| These are often arranged according to atomic number | the elements in the periodic table | $200 | DJ | CHEMISTRY | 1985-10-09 | #283 | |
| Chart of elements arranged by atomic number | the periodic table | $600 | DJ | CHEMISTRY | 1984-11-22 | #54 |