Identify the relationship between the ionization energy of Br^– and the electron affinity of neutral Br.

Determine the correct statement/s for the following equation:

Mg²⁺ + e^- → Mg⁺

i. The ΔE for the reaction is the first electron affinity of Mg²⁺ ion.

ii. The ΔE for the reaction is the negative of the second ionization energy of the Mg atom.

iii. The ΔE for the reaction is the negative of the first electron affinity of Mg²⁺ ion.

iv. The ΔE for the reaction is the second ionization energy of the Mg atom.

Which of the following statements is true?

What is the relationship between ionic radius and effective nuclear charge for isoelectronic ions Cl^- and K⁺?

Select the correct answer for each of the following questions. Each question has only one correct answer.

a) Which of the following elements has the largest atomic radius? 

      Li              K              O                S

b) Which of the following elements has the highest value of first ionization energy?

      Li              K              O                S

c) Which of the following elements has the greatest metallic character?

      Li              K              O                S

d) Which of the following ions has the largest radius? 

      Li⁺            K⁺             O^2-            S^2-

e) Which of the following is the most electronegative element?

      Ba              Ca               S             Te