MCQ
The electronic configuration together with the quantum number of last electron for lithium is
  • A
    $1s^22s^1 \,2, 0, 0 \,+ 1/2$
  • $1s^22s^1\, 2, 0, 0 + 1/2$ or $- 1/2$
  • C
    $1s^22s^02p^1 \,2, 1, 0 \,\pm  1/2$
  • D
    $1s^22s^1\, 2, 1, 0 \,\pm 1/2$

Answer

Correct option: B.
$1s^22s^1\, 2, 0, 0 + 1/2$ or $- 1/2$
b

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