1.Given that the ionization energy of hydrogen-atom ground state is 13.6 eV, how much energy in eV is required to remove an electron from the 3d2 orbital in a Be3+ ion?
(A) 6.8 eV
(B) 18.1 eV
(C) 24.2 eV
(D) 54.4 eV
(E) 61.2 eV

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