Which of the following ion is stable in aqueous solution?
Correct answer: C. Cl-
- A. H+
- B. Atomic radii
- C. Cl-
- D. All are stable
Explanation
Correct: The chloride ion (Cl-) is stable in aqueous solution because it has achieved a stable octet configuration (eight electrons in its outermost shell) by gaining an electron from an electropositive element like chlorine.
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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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