Ion interaction energies are determined by Coulomb's law: 
Determine the energy of potassium chloride if the radius of the potassium ion is 133 pm and that of the chloride ion is 181 pm.
A) -7.36 *10-19 J
B) -7.36 *10-22 J
C) 7.36 *10-19 J
D) 1.74* 10-18 J
E) -7.36 * 10-25 J
Correct Answer:
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