The first four ionization energies for the elements X and Y are shown below. The units

Chapter 7, Problem 7.26

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The first four ionization energies for the elements X and Y are shown below. The units are not kJ/mol. X Y First 170 200 Second 350 400 Third 1800 3500 Fourth 2500 5000 Identify the elements X and Y. There may be more than one correct answer, so explain completely

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