The hydration energy of Mg2+ is greater than that of :
Correct answer: B. Na+
- A. Al3+
- B. Na+
- C. Be2+
- D. Mg3+
Explanation
The correct answer is option B: Na^+. The hydration energy of Mg^2+ is greater than that of Na^+ because Na^+ has lesser ionization energy due to its larger size, which results in lower hydration energy. Option A (Al^3+) is incorrect because it has greater hydration energy along the period. Option C (Be^2+) is incorrect as it has greater hydration energy due to its smaller size. Option D (Mg^3+) is incorrect as hydration energy is inversely proportional to the size of ions.
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The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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