Write the electronic configurations of the elements : Chlorine and Phosphorus.

Explanation

To write the electronic configurations of chlorine and phosphorus, we will follow these steps:

### Step 1: Identify the Atomic Numbers
- Chlorine (Cl) has an atomic number of 17.
- Phosphorus (P) has an atomic number of 15.

### Step 2: Understand the Electron Configuration
The electron configuration describes the distribution of electrons in an atom's orbitals. The order of filling the orbitals is based on the Aufbau principle, which states that electrons occupy the lowest energy orbitals first. The order of filling is generally:
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