The shielding effect of inner electrons is responsible for:
Correct answer: A. Decreasing ionization energy
- A. Decreasing ionization energy
- B. Having no effect on ionization energy
- C. Increasing ionization energy
- D. Increasing electronegativity
Explanation
The shielding effect of inner electrons causes a decrease in attraction between the nucleus and the outer electrons of the atom. Hence, it is easier to remove the outer electrons, which decreases the ionization potential. Therefore, options B and C are incorrect Option D is incorrect because 'Electronegativity' is a measure of an atom's ability to attract shared electrons to itself, and due to the decrease in attraction between the nucleus and the outer electrons, electronegativity will also decrease.
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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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