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Consider the hydrated ions of Ti 2+ , V 2+ , Ti 3+ , and Sc 3+ . The correct order of their spin-only magnetic moments is :

1. Sc 3 + < Ti 3 + < V 2+ < Ti 2+
2. Sc 3 + < Ti 3 + < Ti 2+ < V 2+
3. Ti 3 + < Ti 2 + < Sc 3+ < V 2+
4. V 2 + < Ti 2 + < Ti 3+ < Sc 3+

Correct answer: Sc 3 + < Ti 3 + < Ti 2+ < V 2+

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