SELECT * FROM question_mgmt as q WHERE id=2112 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='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 12th chemistry The d-and f-Block Elements calculate the number of unpaired electrons in the

Question:

Calculate the number of unpaired electrons in the following gaseous ions: Mn3+, Cr3+, V3+ and Ti3+. Which one of these is the most stable in aqueous solution?

Answer:

  Gaseous ions Number of unpaired electrons
(i) Mn3+ , [Ar] 3d4 4
(ii) Cr3+ , [Ar] 3d3 3
(iii) V3+ , [Ar] 3d2 2
(iv) Ti3+ , [Ar] 3d1 1

Cr3+ is the most stable in aqueous solutions owing to a t32g configuration.


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