Write the Lewis dot symbols and predict the valencies for the following elements:
a. Phosphorous , b. Chlorine
c. Argon

Explanation

To solve the question, we will write the Lewis dot symbols for Phosphorus, Chlorine, and Argon, and then predict their valencies based on their electron configurations.

### Step 1: Determine Electron Configuration
1. **Phosphorus (P)**:
- Atomic number: 15
- Electron configuration: 1s² 2s² 2p⁶ 3s² 3p³
- Valence electrons: 5 (from the 3s and 3p orbitals)

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