Write electron dot structure (Lewis structure) of Na, Ca, B

Explanation

To write the electron dot structures (Lewis structures) for sodium (Na), calcium (Ca), and boron (B), we will follow these steps:

### Step 1: Determine the Atomic Number and Electronic Configuration
- **Sodium (Na)**: Atomic number is 11. The electronic configuration is 2, 8, 1.
- **Calcium (Ca)**: Atomic number is 20. The electronic configuration is 2, 8, 8, 2.
- **Boron (B)**: Atomic number is 5. The electronic configuration is 2, 3.

### Step 2: Identify the Valence Electrons
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