Which one of the following is most abudant in earth crust ?

Options

A. Mg
B. Na
C. Al
D. Fe

Answer

To determine which element is the most abundant in the Earth's crust, we can analyze the common elements and their respective abundances. Here’s a step-by-step solution:

### Step 1: Identify the Elements
We need to consider the common elements found in the Earth's crust. The most notable ones include:
- Oxygen
- Silicon
- Aluminum
- Iron
- Magnesium
- Sodium

### Step 2: Review Abundance Percentages
Next, we review the abundance of these elements in the Earth's crust:
- **Oxygen**: 46.1%
- **Silicon**: 28.2%
- **Aluminum**: 8.23%
- **Iron**: 6.2%
- **Magnesium**: 4.1%
- **Sodium**: 3%

### Step 3: Analyze the Data
From the percentages, we can see that:
- Oxygen is the most abundant element, followed by Silicon.
- Aluminum, while abundant, is significantly less than Oxygen and Silicon.

### Step 4: Conclusion
Since the question asks for the most abundant element in the Earth's crust and does not provide options including Oxygen or Silicon, we conclude that among the provided options, **Aluminum** is the most abundant metal in the Earth's crust with an abundance of 8.23%.

### Final Answer
**Aluminum is the most abundant metal in the Earth's crust.**

---