Which of the following outer electronic configuration represents Argon?

Options

A. `2s^2 2p^6`
B. `3s^2 3p^4`
C. `3s^2 3p^6`
D. `3s^2 3p^5`

Answer

To determine which outer electronic configuration represents Argon, we need to analyze the electronic configuration of Argon itself.

### Step-by-Step Solution:

1. **Identify the Atomic Number of Argon**:
- Argon (Ar) has an atomic number of 18. This means it has 18 electrons.

2. **Write the Complete Electronic Configuration**:
- The complete electronic configuration for Argon can be written as:
- 1s² 2s² 2p⁶ 3s² 3p⁶
- Here, the numbers represent the number of electrons in each subshell.

3. **Focus on the Outer Electronic Configuration**:
- The outermost shell for Argon is the third shell (n=3), which includes the 3s and 3p subshells.
- Therefore, the outer electronic configuration is:
- 3s² 3p⁶

4. **Check the Options Provided**:
- We need to look at the options given in the question and find which one matches the outer electronic configuration of Argon (3s² 3p⁶).

5. **Select the Correct Option**:
- After reviewing the options, the one that correctly represents Argon’s outer electronic configuration is the one that includes 3s² and 3p⁶.

### Conclusion:
The correct outer electronic configuration that represents Argon is **3s² 3p⁶**.

---