1. Naturally occurring
2. Solid
3. Inorganic
4. Has an orderly internal structure of atoms
5. Has a definite chemical composition
Most Common Earth Elements:
| Oxygen | 46.6% | |||
| Silicon | 27.7% | |||
| Aluminum | 8.1% | |||
| Iron | 5% | |||
| Calcium | 3.6% | |||
| Sodium | 2.8% | |||
| Potassium | 2.6% | |||
| Magnesium | 2.1% | |||
| Other | 1.5% |
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