Construct an orbital diagram to show the electron configuration for a neutral magnesium atom, mg?

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The electron configuration of Magnesium is 1s22s22p63s2.

electron configurations for Magnesium (Mg)

Now for constructing the orbital diagram, we need to show its electrons in form of an arrow in different boxes using Hund’s and Pauli’s exclusion rule.

  • The orbital diagram of Magnesium contains 1s orbital, 2s orbital, 2p orbital, and 3s orbital. 1s orbital contains 1 box, 2s orbital also contains 1 box, 2p orbital contains 3 boxes, and 3s orbital contains 1 box.
  • Magnesium has a total of 12 electrons and one box can hold up to two electrons.
  • Therefore, the first two electrons will go into the 1s orbital, the next two will go into the 2s orbital, and after that, the next six electrons will go into the 2p orbital, since, the 2p orbital has 3 boxes, so, these electrons will be filled using Hund’s rule. (Each box gets one electron first, then start pairing).
  • After filling these orbitals, we are still left with 2 electrons, this will go in 3s orbital.

orbital diagram for magnesium (Mg)

Electron configuration Vs Orbital diagram for Magnesium

Construct an orbital diagram to show the electron configuration for a neutral magnesium atom, mg?

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