please solve only question 8 ### Chemistry Problem Set**1. Which of the following make an isoelectronic pair?**A) \( \text{Ca}^{2+} \) and \( \text{Fe}^{3+} \)B) \( \text{O}^{2-} \) and \( \text{F}^- \)C) \( \text{F}^- \) and \( \text{Cl}^- \)D) \( \text{Cl}^- \) and \( \text{Ca}^{2+} \)E) None of the above**2. Arrange the following ions in order of increasing ionic radius: \( \text{K}^+, \text{P}^{3-}, \text{S}^{2-}, \text{Cl}^- \)**A) \( \text{K}^+ < \text{Cl}^- < \text{S}^{2-} < \text{P}^{3-} \)B) \( \text{K}^+ < \text{P}^{3-} < \text{S}^{2-} < \text{Cl}^- \)C) \( \text{P}^{3-} < \text{S}^{2-} < \text{Cl}^- < \text{K}^+ \)D) \( \text{P}^{3-} < \text{Cl}^- < \text{S}^{2-} < \text{K}^+ \)**3. Which of the elements listed below has the highest first ionization energy?**A) HeB) NeC) ArD) KrE) Xe**4. The successive (4) ionization energies of a certain element are \( \text{I}_1 = 589.5 \text{ kJ/mol} \), \( \text{I}_2 = 1145 \text{ kJ/mol} \), \( \text{I}_3 = 4900 \text{ kJ/mol} \), \( \text{I}_4 = 6500 \text{ kJ/mol} \), and \( \text{I}_5 = 8100 \text{ kJ/mol} \). This pattern of ionization energies suggests that the unknown element is:**A) PB) SC) AsD) Ca

Lewis structure represent the total number of valence electrons in a molecule. Valence electrons are…

4) The successive () ionization energies of a certain element are 1, kJ/mol, I, 4900 kJ/mol, L = 6500 kJ/mol, and Is-8100 kJ/mol. This pattern of ionization energies suggests that the unknown element is A) K B) Si C) As D) Ca E) S 5) Which of the following elements has the greatest electron affinity? A) Mg B) Al C) Si D) P E) S 6) Select the series of atoms that are arranged in order of increasing electronegativity. A) S< K