| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| Hafnium, quartnium, tenthmium | hafnium | $800 | J | WILL THE REAL CHEMICAL ELEMENT PLEASE STAND UP? | 2013-06-07 | #6625 | |
| Hf:50%, OK? | hafnium | $1,600 | DJ | ELEMENTAL CLUES | 2010-09-13 | #5976 | |
| Sometimes this metallic element, No. 72, "is better than the whole" | hafnium | $1,600 | DJ | THE ELEMENTS | 2005-05-09 | #4771 |