AP Chemistry
1.7 Periodic Trends
1.5 Atomic Structure and Electron Configuration
A student compares experimental data for fluorine and chlorine, as shown in the table below.
Which of the following statements best accounts for why the first electron affinity of \(\text{Cl}\) is more exothermic than that of \(\text{F}\), even though \(\text{F}\) has a higher electronegativity?
| Element | Electronegativity (Pauling scale) | First electron affinity (kJ/mol) |
|---|---|---|
| \(\text{F}\) | \(4.0\) | \(-328\) |
| \(\text{Cl}\) | \(3.0\) | \(-349\) |
Which of the following statements best accounts for why the first electron affinity of \(\text{Cl}\) is more exothermic than that of \(\text{F}\), even though \(\text{F}\) has a higher electronegativity?
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