Magnesium (Mg) has an atomic number of 12. What is the ground-state electron configuration of magnesium?
2 answers:
The answer is 1s22s22p63s2
C. 12222632
You have to follow the Aufbau principle, which states that electrons populate the atomic orbitals situated at the lowest energy first.
The orbitals are:
1
22
333
4444
5555
666
77
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