What is the electron configuration of chlorine (Cl)?

What is the electron configuration of chlorine (Cl)?

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

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