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Which of the following ions has the maximum magnetic moment?

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  1. Mn+2 
  2. Fe+2
  3. Ti+2
  4. Cr+2

Answer (Detailed Solution Below)

Option 1 : Mn+2 
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Detailed Solution

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CONCEPT:

Magnetic Moment

  • The magnetic moment of an ion is related to the number of unpaired electrons present in the ion.
  • It can be calculated using the formula:

    μ = √(n(n+2)) BM

  • Where μ is the magnetic moment and n is the number of unpaired electrons.

EXPLANATION:

Ion Electronic Configuration Number of Unpaired Electrons Magnetic Moment (BM)
Mn2+ [Ar] 3d5 5 √35
Fe2+ [Ar] 3d6 4 √24
Ti2+ [Ar] 3d2 2 √8
Cr2+ [Ar] 3d4 4 √24

Therefore, the ion with the maximum magnetic moment is Mn2+.

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