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Which of the following species has the smallest ionic radius?

A. Na+
B. Al3+
C. Cl-
D. S2-
E. Mg2+

User Jonte
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Final answer:

The species with the smallest ionic radius among the given options is Cl-.

Step-by-step explanation:

The ionic radius is determined by the number of protons and electrons in the ion, as well as the effective nuclear charge. Since Cl- has the greatest nuclear charge among the options, it has the smallest ionic radius.

User Sergey Chikuyonok
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