Assertion : `Fe^(2+)` has 3de electronic configuration.
Reason : Electrons are lost from 4s-orbital to form `Fe^(2+)` ion.

Options

A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C. Assertion is correct statement but reason is wrong statement.
D. Assertion is wrong statement but reason is correct statement

Answer

To solve the question regarding the assertion and reason about the electronic configuration of the `Fe^(2+)` ion, we can follow these steps:

### Step 1: Determine the Atomic Number of Iron
The atomic number of iron (Fe) is 26. This means that a neutral iron atom has 26 electrons.

### Step 2: Write the Electron Configuration of Neutral Iron
The electron configuration of iron can be written as:
- `Fe: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ 4s²`
This can also be expressed in shorthand notation as:
- `Fe: [Ar] 3d⁶ 4s²`
where [Ar] represents the electron configuration of Argon (18 electrons).

### Step 3: Determine the Electron Configuration of `Fe^(2+)`
To form the `Fe^(2+)` ion, we need to remove two electrons from the neutral iron atom. Electrons are removed from the outermost shell first. In this case, the outermost shell is the 4s orbital.

- Removing 2 electrons from the 4s orbital gives us:
- `Fe^(2+): [Ar] 3d⁶`
This means that the `Fe^(2+)` ion has 6 electrons in the 3d subshell.

### Step 4: Analyze the Assertion and Reason
- **Assertion**: `Fe^(2+)` has a 3d⁶ electronic configuration.
- This is **True** because we have established that `Fe^(2+)` indeed has the configuration `[Ar] 3d⁶`.

- **Reason**: Electrons are lost from the 4s orbital to form `Fe^(2+)` ion.
- This is also **True** since we remove the 2 electrons from the 4s orbital when forming the `Fe^(2+)` ion.

### Step 5: Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion. Therefore, the correct answer is that both statements are true and the reason is a correct explanation of the assertion.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation for the assertion.

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