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Study the information in the table and answer the questions that follow: Explain why:
(i) the ionic radius of #K^+# is greater than that of #Na^+#
(ii) #Mg^(3+)# is smaller than that of Na+

Answer Text:
(i) This is because #K^+# has three energy level while #Na^+# has two energy levels.
(ii) This is because #Mg^(2+)# has higher nuclear charge than #Na^+# meaning that #Mg^(2+)# nuclear has 12 protons attracting 10 electrons while
#Na^+# has 11 protons attracting 10 electrons