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Question 21082
NEET Chemistry · Medium

Structure of Atom: Electronic configuration MCQ

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Electronic configurationMediumQuestion 21082

Question

Electronic configuration of sodium (Z = 11) is:

  1. A
    1s22s22p63s11s^22s^22p^63s^1
    Correct
  2. B
    1s22s22p53s21s^22s^22p^53s^2
  3. C
    1s22s22p63p11s^22s^22p^63p^1
  4. D
    1s22s22p64s11s^22s^22p^64s^1

Correct answer

1s22s22p63s11s^22s^22p^63s^1

Explanation

The eleventh electron enters 3s.

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