Medium
The correct electronic configuration for the ground state of silicon (atomic number $= 14$) is
- A$1 s^2 2 s^2 2 p^6 3 s^2 3 p^2$
- B$1 s^2 2 s^2 2 p^6 3 p^4$
- C$1 s^2 2 s^2 2 p^4 3 s^2 3 p^4$
- D$1 s^2 2 s^2 2 p^6 3 s^1 3 p^5$
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