The abundance of elements in the Earth's crust varies significantly, with certain elements being much more prevalent than others. Here is a list of some of the most abundant elements found in the Earth's crust, typically expressed in weight percent (%): 1. **Oxygen (O)** - ~46.6% 2. **Silicon (Si)** - ~27.7% 3. **Aluminum (Al)** - ~8.1% 4. **Iron (Fe)** - ~5.
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