Classification of Elements and Periodicity in Properties · NEET Preparation Chemistry
Which of the following species has the largest radius?
Practice question from Classification of Elements and Periodicity in Properties (NEET Preparation Chemistry), with the correct answer and a step-by-step solution.
easy · MCQ · Q-45C570
Which of the following species has the largest radius?
- A.Cl^-Correct answer
- B.Ar
- C.K^+
- D.Ca^{2+}
Solution
All the given species () are isoelectronic, meaning they all contain 18 electrons. For isoelectronic species, as the nuclear charge (atomic number, ) increases, the attractive force of the nucleus on the electrons increases, leading to a smaller ionic radius. has the lowest atomic number (), hence it has the largest radius.
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