Choose the correct option for the electronic configuration of magnesium: i)[Ne] 3s2 ii) 4f14 5d10 6s1 iii) 4d10 5s1 iv) [He]2s2 2p2

The correct option for the electronic configuration of magnesium is (i)[Ne] 3s2

Electronic configuration of magnesium

The atomic number of magnesium is 12. The electronic configuration of magnesium can be written as 1s2 2s2 2p6 3s2 or can be also written as [Ne] 3s2. The first two electrons will go in the 1s orbital. The remaining 2 electrons for magnesium go in the 2s orbital as the first orbital can hold only 2 electrons. The p orbital can hold 6 electrons, so the next six electrons will go in the 2p orbital. Then put the remaining two electrons in the 3s.

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