What is the electron configuration of the alkaline earth metal magnesium?

What is the electron configuration of the alkaline earth metal magnesium?

Step 1: Identify the atomic number of magnesium (Mg), which is 12.
Step 2: Understand that the atomic number tells us the number of electrons in a neutral atom, so magnesium has 12 electrons.
Step 3: Fill the electron shells according to the order of energy levels: 1s, 2s, 2p, 3s.
Step 4: Start filling the first shell (1s) with 2 electrons: 1s².
Step 5: Move to the second shell and fill the 2s subshell with 2 electrons: 2s².
Step 6: Fill the 2p subshell with 6 electrons: 2p⁶.
Step 7: Finally, fill the 3s subshell with the remaining 2 electrons: 3s².
Step 8: Combine all the filled subshells to write the complete electron configuration: 1s² 2s² 2p⁶ 3s².

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