The outermost electric configuration of the most electron of chlorine atom is

Options

A. `ns^(2)np^(3)`
B. `ns^(2)np^(4)`
C. `ns^(2)np^(5)`
D. `ns^(2)np^(6)`

Explanation

To determine the outermost electronic configuration of the most electronegative atom, which is chlorine, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electronegativity**:
- Electronegativity is the tendency of an atom to attract electrons towards itself in a chemical bond. Halogens are known to be the most electronegative elements.

2. **Identifying the Group of Chlorine**:
- Chlorine (Cl) is a halogen and belongs to Group 17 of the periodic table.

3. **General Electronic Configuration of Halogens**:
- The general electronic configuration for halogens can be expressed as \( ns^2 np^5 \), where \( n \) is the principal quantum number corresponding to the outermost shell.

4. **Finding the Principal Quantum Number for Chlorine**:
- Chlorine has an atomic number of 17. Its electrons are distributed in the following shells:
- 1st shell: 2 electrons (1s²)
- 2nd shell: 8 electrons (2s² 2p⁶)
- 3rd shell: 7 electrons (3s² 3p⁵)
- Therefore, the outermost shell for chlorine is the third shell (n=3).

5. **Writing the Outermost Electronic Configuration**:
- For chlorine, the outermost electronic configuration can be written as:
\[ 3s^2 3p^5 \]
- This follows the general configuration \( ns^2 np^5 \) where \( n = 3 \).

6. **Conclusion**:
- The outermost electronic configuration of the chlorine atom is \( 3s^2 3p^5 \).

### Final Answer:
The outermost electronic configuration of the most electronegative chlorine atom is \( 3s^2 3p^5 \).

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