Which of the following electronic configurations is wrong?

Options

A. `Li(3) =2,1`
B. `O(8) =2,6`
C. `S(16) = 2,6,8`
D. `P(15) =2,8,5`

Explanation

To determine which of the given electronic configurations is incorrect, we will analyze each option step by step.

### Step 1: Analyze the electronic configuration of Lithium (Li)
- **Atomic Number of Lithium (Li)**: 3
- **Filling Order**:
- First shell can hold 2 electrons.
- Second shell can hold up to 8 electrons.
- **Configuration**:
- 2 electrons in the first shell and 1 electron in the second shell.
- **Result**: The electronic configuration of Lithium is **1s² 2s¹** or simply **2, 1**. This is correct.

### Step 2: Analyze the electronic configuration of Oxygen (O)
- **Atomic Number of Oxygen (O)**: 8
- **Filling Order**:
- First shell can hold 2 electrons.
- Second shell can hold up to 8 electrons.
- **Configuration**:
- 2 electrons in the first shell and 6 electrons in the second shell.
- **Result**: The electronic configuration of Oxygen is **1s² 2s² 2p⁶** or simply **2, 6**. This is correct.

### Step 3: Analyze the electronic configuration of Sulfur (S)
- **Atomic Number of Sulfur (S)**: 16
- **Filling Order**:
- First shell can hold 2 electrons.
- Second shell can hold up to 8 electrons.
- Third shell can hold up to 18 electrons but will fill according to the number of electrons available.
- **Configuration**:
- 2 electrons in the first shell, 8 in the second shell, and the remaining 6 in the third shell.
- **Result**: The electronic configuration of Sulfur is **1s² 2s² 2p⁶ 3s² 3p⁴** or simply **2, 8, 6**. This is correct.

### Step 4: Analyze the electronic configuration of Phosphorus (P)
- **Atomic Number of Phosphorus (P)**: 15
- **Filling Order**:
- First shell can hold 2 electrons.
- Second shell can hold up to 8 electrons.
- Third shell can hold up to 18 electrons but will fill according to the number of electrons available.
- **Configuration**:
- 2 electrons in the first shell, 8 in the second shell, and the remaining 5 in the third shell.
- **Result**: The electronic configuration of Phosphorus is **1s² 2s² 2p⁶ 3s² 3p³** or simply **2, 8, 5**. This is correct.

### Conclusion
After analyzing all the electronic configurations, we find that:
- The electronic configuration of Sulfur (C option) is stated incorrectly in the question. The correct configuration should be **2, 8, 6** but it was misrepresented.

Thus, the answer to the question is **C (Sulfur)**.

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