The most abundant transition metal in earth crust is :

Options

A. Zn
B. Fe
C. Hg
D. Au

Answer

To determine the most abundant transition metal in the Earth's crust from the options given (Zn, Fe, Hg, Au), we can follow these steps:

### Step 1: Understand the Definition of Transition Metals
Transition metals are defined as elements that have partially filled d-orbitals. They are found in the d-block of the periodic table.

### Step 2: Identify the Given Options
The options provided are:
- Zn (Zinc)
- Fe (Iron)
- Hg (Mercury)
- Au (Gold)

### Step 3: Research the Abundance of Each Metal
We need to look at the abundance of each of these metals in the Earth's crust:
- **Zn (Zinc)**: Commonly found but not the most abundant.
- **Fe (Iron)**: Known to be one of the most abundant elements in the Earth's crust.
- **Hg (Mercury)**: Rare in the Earth's crust.
- **Au (Gold)**: Very rare in the Earth's crust.

### Step 4: Compare the Abundance
Based on geological studies and data:
- Iron (Fe) is the most abundant transition metal in the Earth's crust, making up about 5% by weight.
- Zinc (Zn) is also present but in lesser amounts.
- Mercury (Hg) and Gold (Au) are significantly less abundant.

### Step 5: Conclusion
From the analysis, we conclude that the most abundant transition metal in the Earth's crust is **Fe (Iron)**.

### Final Answer
The most abundant transition metal in the Earth's crust is **Fe (Iron)**.

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