The most abundant metal in the earth crust is

Options

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

Answer

To determine the most abundant metal in the Earth's crust, we can follow these steps:

### Step 1: Identify the metals listed in the options
The options given are Sodium, Magnesium, Aluminium, and Iron (Fe).

### Step 2: Research the abundance of each metal in the Earth's crust
- **Sodium (Na)**: Sodium is present in the Earth's crust but is not among the most abundant metals.
- **Magnesium (Mg)**: Magnesium is also present but is less abundant than Aluminium and Iron.
- **Aluminium (Al)**: Aluminium is known to be the third most abundant element in the Earth's crust, making up about 7.4% of it.
- **Iron (Fe)**: Iron is more abundant than Aluminium and is considered the second most abundant metal in the Earth's crust.

### Step 3: Compare the percentages of each metal
- Aluminium: ~7.4%
- Iron: ~5% (but more abundant than Aluminium in terms of total weight)
- Sodium and Magnesium are less than these two.

### Step 4: Conclude which metal is the most abundant
From the information gathered, we can conclude that Aluminium is the most abundant metal in the Earth's crust, as it is the most prevalent among the options provided.

### Final Answer
The most abundant metal in the Earth's crust is **Aluminium (Al)**.

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