The first ionization energy of Al is less than Mg. This is due to:
Correct answer: A. Electron in the 3P1 of Al
- A. Electron in the 3P1 of Al
- B. Al is less metallic than Mg
- C. Mg comes first than Al
- D. lonization energy from Mg to Al decreases
Explanation
The outer electron in magnesium is in an s sub-shell. However, the outer electron in aluminum is in a p sub-shell, so it is higher in energy than the outer electron in magnesium. This means that less energy is needed to remove it.
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