What is the electron configuration of chlorine (Cl)?

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Question: What is the electron configuration of chlorine (Cl)?

Options:

Correct Answer: 1s2 2s2 2p6 3s2 3p5

Solution:

The electron configuration of chlorine (atomic number 17) is 1s2 2s2 2p6 3s2 3p5.

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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