| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In 1774 this British chemist discovered a gas he called "dephlogisticated air", what we now call oxygen | Joseph Priestley | $1,600 | DJ | "P"SCIENTISTS | 2014-03-14 | #6795 | |
| This discoverer of oxygen was a founder of the 1st Unitarian Church in Pennsylvania in 1796 | Joseph Priestley | $800 | DJ | SCIENTISTS | 1991-10-22 | #1642 | |
| Sweden's Carl Wilhelm Scheele & this 18th century Englishman are both credited with discovering oxygen | Joseph Priestley | $1,000 | DJ | SCIENTISTS | 1991-04-16 | #1537 |