An element having low IE and low EA is likely to belong to
Correct answer: A. Group IA
- A. Group IA
- B. Group IB
- C. Group VIIA
- D. Group VIII
Explanation
The correct answer is Group IA. Elements in Group IA are alkali metals, which are characterized by their low ionization energy and low electron affinity. This is because they have one electron in their outermost shell, which they can lose easily to achieve a stable noble gas configuration. This makes them highly reactive, especially with nonmetals. In contrast, Group IB elements are transition metals with relatively higher ionization energies and electron affinities than Group IA. Group VIIA elements, the halogens, have high electron affinities, as they tend to gain electrons to complete their valence shell. Group VIII elements, the noble gases, have high ionization energies and very low electron affinities due to their full valence shells, making them the most stable group on the periodic table.
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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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