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OBQ Practice Questions - Olimpíada Brasileira De Química Exam

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An unknown main-group element X in Period 3 displays the following successive ionization energies (in kJ/mol): IE1 = 578, IE2 = 1817, IE3 = 2745, IE4 = 11578, IE5 = 14842. In which IUPAC group of the periodic table is element X located?
Correct Answer:
Group 13

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