Which one of the following is the most abundant metallic element?

Options

A. Aluminium
B. Iron
C. Gold
D. Silver

Explanation

To determine which one of the following is the most abundant metallic element, we will analyze the options provided: Aluminium, Iron, Gold, and Silver.

### Step 1: Identify the Elements
The elements given in the options are:
- A) Aluminium (Al)
- B) Iron (Fe)
- C) Gold (Au)
- D) Silver (Ag)

### Step 2: Research the Abundance of Each Element
Next, we need to look at the abundance of these metallic elements in the Earth's crust:
- **Aluminium**: Approximately 8.1% of the Earth's crust is Aluminium.
- **Iron**: Approximately 5% of the Earth's crust is Iron.
- **Gold**: Gold is much rarer, making up about 0.004 parts per million in the Earth's crust.
- **Silver**: Silver is also rare, with about 0.07 parts per million in the Earth's crust.

### Step 3: Compare the Percentages
Now, we compare the percentages of these elements:
- Aluminium: 8.1%
- Iron: 5%
- Gold: 0.004%
- Silver: 0.07%

### Step 4: Determine the Most Abundant Element
From the comparison, we can see that Aluminium has the highest percentage in the Earth's crust compared to Iron, Gold, and Silver.

### Conclusion
Thus, the most abundant metallic element among the options provided is **Aluminium (Option A)**.

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