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the complete electron configuration of mg is , whereas the complete electron configuration of al is .target 1 of 7 target 2 of 7 removing an electron from the orbital of mg requires energy than removing an electron from the orbital of al .target 3 of 7 target 4 of 7 target 5 of 7 however, when adding an electron, the electron affinity for mg is negative than that of al because the electron is being added to sublevel.

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The complete electronic configuration of Mg is 1s² 2s² 2p⁶ 3s² and the electronic configuration of Al is 1s² 2s² 2p⁶ 3s² 3p¹.

The The complete electronic configuration of Mg is 1s² 2s² 2p⁶ 3s² and the electronic configuration of Al is 1s² 2s² 2p⁶ 3s² 3p¹. so Mg has more stable configuration than the Al. removing an electron from the 3s² orbital of Mg requires more energy than removing an electron from the 3p¹ orbital of Al .

However, when adding an electron, the electron affinity for Mg is less negative than that of Al because the electron is being added to sublevel.

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