What is the electron configuration of the s-block element magnesium?
Correct Answer: 1s² 2s² 2p⁶ 3s²
- Step 1: Identify the atomic number of magnesium (Mg), which is 12.
- Step 2: Understand that the electron configuration shows how electrons are distributed in an atom.
- Step 3: Start filling the electron shells with electrons, beginning from the lowest energy level.
- Step 4: Fill the 1s orbital first, which can hold 2 electrons: 1s².
- Step 5: Next, fill the 2s orbital, which also holds 2 electrons: 2s².
- Step 6: Then, fill the 2p orbital, which can hold 6 electrons: 2p⁶.
- Step 7: After filling the first two shells, move to the third shell and fill the 3s orbital with 2 electrons: 3s².
- Step 8: Combine all the filled orbitals to write the complete electron configuration: 1s² 2s² 2p⁶ 3s².
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