| Tons per Square Mile | Answer | % Correct |
|---|---|---|
| 2,442,450,000 | Oxygen | 99%
|
| 307,230,000 | Hydrogen | 98%
|
| 79,800 | Carbon | 88%
|
| 31,492,000 | Sodium | 88%
|
| 56,629,000 | Chlorine | 77%
|
| 1,185,000 | Potassium | 72%
|
| 1,202,000 | Calcium | 71%
|
| 2,644,000 | Sulfur | 68%
|
| 3,779,000 | Magnesium | 67%
|
| 191,805 | Bromine | 31%
|