Table
Composition of Earth Crust
| S. No. | Element | By weight(%) |
|---|---|---|
| 1 | Oxygen | 46.60% |
| 2 | Silicon | 27.70% |
| 3 | Aluminium | 8.10% |
| 4 | Iron | 5.00% |
| 5 | Calcium | 3.60% |
| 6 | Sodium | 2.80% |
| 7 | Potassium | 2.50% |
| 8 | Magnesium | 2.09% |
| 9 | Others | 1.41% |
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