Which one of the following elements is most abundant in earth crust ?

Options

A. Aluminium
B. Silicon
C. Carbon
D. Oxygen

Answer

To determine which element is most abundant in the Earth's crust, we can analyze the given options based on their approximate percentages in the crust.

### Step-by-Step Solution:

1. **Identify the Elements and Their Percentages**:
- Aluminium (Al): Approximately 8.23%
- Silicon (Si): Approximately 28.2%
- Carbon (C): Approximately 1%
- Oxygen (O): Approximately 46.1%

2. **Compare the Percentages**:
- Compare the percentages of each element:
- Aluminium: 8.23%
- Silicon: 28.2%
- Carbon: 1%
- Oxygen: 46.1%

3. **Determine the Most Abundant Element**:
- From the percentages, we can see that Oxygen (46.1%) has the highest percentage compared to Aluminium (8.23%), Silicon (28.2%), and Carbon (1%).

4. **Conclusion**:
- Therefore, the most abundant element in the Earth's crust is **Oxygen**.

### Final Answer:
The most abundant element in the Earth's crust is **Oxygen**.

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