SELECT * FROM question_mgmt as q WHERE id=4027 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=8 AND subId=16 AND chapterId=183 and ex_no='8' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 9th science Structure of the Atom which one of the following is a correct electronic

Question:

Which one of the following is a correct electronic configuration of sodium?
(a) 2,8        (b) 8,2,1        (c) 2,1,8        (d) 2,8,1.

Answer:

(d) 2, 8, 1


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  • Answered by Ekta Mehta
  • 4 months ago

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