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Make Up Test Booklet backbone (A) C- H backbone H H H (B) - H backbone - H backbone - - H - H (C) backbone - - H backbone H . - H. (D) backbone - H backbone 40. Ionization Energy (kJ/mol) First 801 Second 2,430 Third 3,660 Fourth 25,000 Fifth 32,820 The first five ionization energies of a second-period element are listed in the table above. Which of the following correctly identifies the element and best explains the data in the table? AP Chemistry Page 15 of 21