An analysis of the arrangements' properties reveals:
(A) Paramagnetic Behavior: Paramagnetism arises from unpaired electrons, and its magnitude typically correlates with the number of such electrons. For instance, Fe2+ (four unpaired electrons) should exhibit greater paramagnetism than Mn2+ but less than Cr2+. Consequently, the provided order is inaccurate.
(B) Number of Unpaired Electrons: The sequence of unpaired electrons among the listed transition metal cations lacks a consistent increasing trend. For example, Cr2+ possesses 4 unpaired electrons, while Ni2+ has 2, and Zn2+ is diamagnetic. Therefore, this order is incorrect.
(C) Number of Oxidation States: Transition metals display multiple oxidation states; fewer d electrons generally result in fewer accessible oxidation states. Sc3+ exists solely as Sc3+. The stability of the 3+ state progressively increases from Ti3+ to Mn3+. Hence, the provided order is accurate.
(D) Stability in Aqueous Solution: Aqueous stability of transition metal ions depends on various factors, including charge density, hydration energy, and crystal field stabilization energy. This stability is complex, inconsistent, lacks a general trend, and is not simply predictable. Thus, the presented order is incorrect.
Which of the following statements are true?
A. Unlike Ga that has a very high melting point, Cs has a very low melting point.
B. On Pauling scale, the electronegativity values of N and C are not the same.
C. $Ar, K^{+}, Cl^{–}, Ca^{2+} and S^{2–}$ are all isoelectronic species.
D. The correct order of the first ionization enthalpies of Na, Mg, Al, and Si is Si $>$ Al $>$ Mg $>$ Na.
E. The atomic radius of Cs is greater than that of Li and Rb.
Choose the correct answer from the options given below: