What is the electron configuration of the element with atomic number 12?

What is the electron configuration of the element with atomic number 12?

Step 1: Identify the atomic number. The atomic number given is 12.
Step 2: Find the element that corresponds to atomic number 12. This element is Magnesium (Mg).
Step 3: Understand that the electron configuration shows how electrons are arranged in an atom.
Step 4: Start filling the electron shells according to the Aufbau principle.
Step 5: Fill the 1st shell (1s) with 2 electrons: 1s2.
Step 6: Fill the 2nd shell (2s) with 2 electrons: 2s2.
Step 7: Fill the 2nd shell (2p) with 6 electrons: 2p6.
Step 8: Fill the 3rd shell (3s) with 2 electrons: 3s2.
Step 9: Combine all the filled shells to write the complete electron configuration: 1s2 2s2 2p6 3s2.

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