The halogen having highest electron affinity is_____________________?
Correct answer: B. Chlorine
- A. Fluorine
- B. Chlorine
- C. Bromine
- D. Iodine
Explanation
Chlorine has the highest electron affinity among the halogens because its larger atomic size allows an incoming electron to enter with less electron-electron repulsion than in fluorine. Fluorine is the likely alternative because it is the most electronegative halogen, but electronegativity and electron affinity are not identical properties.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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