Answer
See the explanation
Work Step by Step
a. The fourth ionization energy of Se can be represented by the following equation:
\[ \text{Se}^{3+} \rightarrow \text{Se}^{4+} + e^- \]
b. The electron affinity of \( \mathrm{S}^{-} \) can be represented by the following equation:
\[ \text{S}^- + e^- \rightarrow \text{S}^{2-} \]
c. The electron affinity of \( \mathrm{Fe}^{3+} \) can be represented by the following equation:
\[ \text{Fe}^{3+} + e^- \rightarrow \text{Fe}^{2+} \]
d. The ionization energy of \( \mathrm{Mg} \) can be represented by the following equation:
\[ \text{Mg} \rightarrow \text{Mg}^+ + e^- \]
