| Parts per million | Answer | % Correct |
|---|---|---|
| 461000 | Oxygen | 97%
|
| 56300 | Iron | 94%
|
| 1400 | Hydrogen | 85%
|
| 23300 | Magnesium | 73%
|
| 82300 | Aluminium | 67%
|
| 20900 | Potassium | 61%
|
| 282000 | Silicon | 61%
|
| 41500 | Calcium | 58%
|
| 23600 | Sodium | 52%
|
| 5650 | Titanium | 24%
|