Place the following ions in order from smallest to largest ionic radii: Note that < means less than.
K + , Ca 2+ , S 2- , and Cl - .
a. S 2- < Cl - < Ca 2+ < K +
b. Ca 2+ < K + < Cl - < S 2-
c. S 2- < Cl - < K + < Ca 2+
d. K + < Cl - < S 2- < Ca 2+
e. Ca 2+ < K + < S 2- < Cl -
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