Electron affinity decreases down the group due to:
Correct answer: A. Increase in atomic radius
- A. Increase in atomic radius
- B. Decrease in atomic radius
- C. Increase in electronegativity
- D. All of the above options are correct
Explanation
Electron affinity decreases from top to bottom within a group. This is caused by the increase in atomic radius.
This question appeared on the NUMS 2021 paper, which you can sit online with every answer explained.
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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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