| Hint | Answer | % Correct |
|---|---|---|
| ~9,000 BC | Copper | 100%
|
| ~6,000 BC | Gold | 100%
|
| ~5,000 BC | Iron | 100%
|
| ~1,500 BC | Mercury | 100%
|
| ~5,000 BC | Silver | 100%
|
| ~3,750 BC | Carbon | 80%
|
| ~7,000 BC | Lead | 80%
|
| ~2,000 BC | Sulfur | 80%
|
| ~3,500 BC | Tin | 80%
|
| ~1,000 BC | Zinc | 70%
|
| ~850 AD | Antimony | 60%
|
| ~850 AD | Arsenic | 50%
|
| ~600 BC | Platinum | 30%
|
| ~1,500 | Bismuth | 20%
|
| 1,669 | Phosphorous | 0%
|