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What is the electron configuration of Magnesium?

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Question: What is the electron configuration of Magnesium?

Options:

  1. 1s² 2s² 2p⁶ 3s²
  2. 1s² 2s² 2p⁶ 3s² 3p¹
  3. 1s² 2s² 2p⁶ 3s² 3p²
  4. 1s² 2s² 2p⁶ 3s² 3d¹

Correct Answer: 1s² 2s² 2p⁶ 3s²

Solution: 

The electron configuration of Magnesium (Mg) is 1s² 2s² 2p⁶ 3s².

What is the electron configuration of Magnesium?

Practice Questions

Q1
What is the electron configuration of Magnesium?
  1. 1s² 2s² 2p⁶ 3s²
  2. 1s² 2s² 2p⁶ 3s² 3p¹
  3. 1s² 2s² 2p⁶ 3s² 3p²
  4. 1s² 2s² 2p⁶ 3s² 3d¹

Questions & Step-by-Step Solutions

What is the electron configuration of Magnesium?
  • Step 1: Identify the atomic number of Magnesium (Mg), which is 12. This means it has 12 electrons.
  • Step 2: Start filling the electron shells according to the Aufbau principle, which states that electrons fill the lowest energy levels first.
  • Step 3: Fill the first shell (1s) with 2 electrons. This gives us 1s².
  • Step 4: Move to the second shell and fill the 2s sublevel with 2 electrons. Now we have 1s² 2s².
  • Step 5: Next, fill the 2p sublevel with 6 electrons. This gives us 1s² 2s² 2p⁶.
  • Step 6: Finally, fill the 3s sublevel with the remaining 2 electrons. This results in the complete configuration of 1s² 2s² 2p⁶ 3s².
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