The elements of which group show abnormally very low values of electron affinity in every period of periodic table?
Correct answer: C. Both A & B
- A. Group 2A
- B. Group 5A
- C. Both A & B
- D. None of these
Explanation
Correct option is C. Elements in group 2 of the periodic table do not have a high electron affinity. The elements in this group have a filled s-orbital, adding an electron would go to the p-orbital which is higher in energy. The Group 5A elements N, P, As have lower (less negative) electron affinities than most of the Group 4A or Group 6A elements because N, P, As have half-filled subshells.
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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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