The one with largest size is
Correct answer: C. Cl-
- A. Cl
- B. Cl+
- C. Cl-
- D. Cl3+
Explanation
The size of an atom or ion depends on its electron configuration. Adding electrons (as in Cl-) increases repulsion between electrons and expands the electron cloud, resulting in a larger size. Conversely, losing electrons (as in Cl+) reduces electron-electron repulsion, making the ion smaller. Cl3+ is not a realistic species for chlorine due to its high ionization energy. Thus, Cl- has the largest size among the options.
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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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