Identify the correct Lewis symbol from the following

Options

A. `.overset(.)underset(.)C.`
B. `underset(..)N:`
C. `.overset(.)underset(.)B.`
D. `underset(..)Na:`

Explanation

To identify the correct Lewis symbol from the given options, we need to follow these steps:

### Step 1: Understand the Lewis Symbol
The Lewis symbol represents an element's valence electrons using dots around the element's symbol. The number of dots corresponds to the number of valence electrons.

### Step 2: Determine the Electronic Configuration and Valence Electrons
- **Carbon (C)**:
- Atomic number: 6
- Electronic configuration: 1s² 2s² 2p²
- Valence electrons: 4 (from the 2s and 2p orbitals)

### Step 3: Write the Lewis Symbol for Carbon
- The Lewis symbol for carbon will be represented as:
- C with 4 dots around it:
```
•
• C •
•
```

### Step 4: Check the Other Options
- **Nitrogen (N)**:
- Atomic number: 7
- Electronic configuration: 1s² 2s² 2p³
- Valence electrons: 5
- Correct Lewis symbol: N with 5 dots. If it shows only 4 dots, it is incorrect.

- **Boron (B)**:
- Atomic number: 5
- Electronic configuration: 1s² 2s² 2p¹
- Valence electrons: 3
- Correct Lewis symbol: B with 3 dots. If it shows 4 dots, it is incorrect.

- **Sodium (Na)**:
- Atomic number: 11
- Electronic configuration: 1s² 2s² 2p⁶ 3s¹
- Valence electrons: 1
- Correct Lewis symbol: Na with 1 dot. If it shows 4 dots, it is incorrect.

### Step 5: Identify the Correct Lewis Symbol
From the analysis:
- The correct Lewis symbol is for Carbon, which shows 4 valence electrons.

Thus, the answer is **A (Carbon)**.