MCQ
The electronic configuration $1 s^2, 2 s^2 2 p^6, 3 s^1 3 p^1$ correctly describes:
  • excited state of Mg
  • B
    excited state of Al3+
  • C
    ground state of Si+
  • D
    ground state of Na

Answer

Correct option: A.
excited state of Mg
(A)excited state of Mg
Explanation:
Ground state of ${ }_{12} Mg 1 s^2, 2 s^2 2 p^6, 3 s^2$.

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