# the pair of metal ions that can give a spin - only magnetic moment of 3.9 BM for the complex [M(H_(2) O)_(6)]Cl_(2)is

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the pair of metal ions that can give a spin - only magnetic moment of 3.9 BM for the complex [M(H_(2) O)_(6)]Cl_(2)is
A. Cr^(2+) and Mn^(2+)
B. V^(2+) and Co^(2+)
C. V^(2+) and Fe^(2+)
D. Co^(2+) and Fe^(2+).

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