What is the spin-only magnetic moment value (B.M.) of a divalent metal ion with atomic number 25, in its aqueous solution?

Question

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Strategy:
 The magnetic moment () is related to the number of unpaired electrons () by the formula:  BM. The number of unpaired electrons depends on the metal's d-electron count and the ligand field strength.

Step 1: Identify the central metal ion
A divalent metal ion with atomic number 25 is .
Electronic configuration of Mn (): .
Electronic configuration of : .

Step 2: Determine ligand field and electron distribution
In an aqueous solution, the ligand is , which is a weak field ligand.
Theref

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