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  • Transition elements show a magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost the same spin only magnetic moment? (i) {CO}^{2+} (ii){Cr}^{2+} (iii) {Mn}^{2+}

Transition elements show a magnetic moment due to spin and orbital motion of electrons. Which of the following metallic ions have almost the same spin only magnetic moment?

(i) \text {Co}^{2+}

(ii) \text {Cr}^{2+}

(iii) \text {Mn}^{2+}

(iv) \text {Cr}^{3+}

Answers (1)

The answer is the option (i, iv) The metallic ions \text {Co}^{2+} (3d^{7}) and \text {Cr}^{3+} (3d^{3}) have same number of unpaired electrons which is 3. Thus, they have similar spin only magnetic moment.

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