Which is not arranged in the correct sequence:
Correct answer: A. d5, d3, d1, d4 - increasing magnetic moment
- A. d5, d3, d1, d4 - increasing magnetic moment
- B. MO, M2O3, MO2, M2O5 - decreasing basic strength
- C. Sc, V, Cr, Mn - increasing number of oxidation states
- D. Co2+, Fe3+, Cr3+, Sc3+ - increasing stability
Explanation
Magnetic moment is proportional to the number of unpaired electrons. The number of unpaired electrons for these configurations is 5, 3, 1, and 4 respectively. The correct increasing order would be d¹, d³, d⁴, d⁵. The given sequence is incorrect.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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