What is the electronic configuration of the element with atomic number 17?

What is the electronic configuration of the element with atomic number 17?

Step 1: Identify the element with atomic number 17. This element is Chlorine (Cl).
Step 2: Understand that the electronic configuration shows how electrons are arranged in an atom.
Step 3: Start filling the electron shells according to the Aufbau principle, which states that electrons fill the lowest energy levels first.
Step 4: The first shell can hold 2 electrons: 1s2.
Step 5: The second shell can hold 8 electrons: 2s2 2p6 (2 in 2s and 6 in 2p).
Step 6: The third shell can hold up to 8 electrons, but Chlorine has only 7 electrons in this shell: 3s2 3p5 (2 in 3s and 5 in 3p).
Step 7: Combine all the filled shells to get the complete electronic configuration: 1s2 2s2 2p6 3s2 3p5.

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