SELECT * FROM question_mgmt as q WHERE id=1527 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=63 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

Calculate the 'spin only' magnetic moment of M2+(aq) ion (Z = 27).

Answer:

Z = 27

[Ar] 3d7 4s2

M2+ = [Ar] 3d7

3d7 =

i.e., 3 unpaired electrons

n = 3


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