What is the electronic configuration of Chlorine?

What is the electronic configuration of Chlorine?

Step 1: Identify the atomic number of Chlorine (Cl), which is 17. This means Chlorine has 17 electrons.
Step 2: Start filling the electron shells according to the order of energy levels.
Step 3: Fill the first shell (1s) with 2 electrons: 1s2.
Step 4: Fill the second shell (2s) with 2 electrons: 2s2.
Step 5: Fill the second shell's p subshell (2p) with 6 electrons: 2p6.
Step 6: Move to the third shell (3s) and fill it with 2 electrons: 3s2.
Step 7: Finally, fill the third shell's p subshell (3p) with 5 electrons: 3p5.
Step 8: Combine all the filled subshells to write the complete electronic configuration: 1s2 2s2 2p6 3s2 3p5.

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