Which, if any, is the ground-state electron configuration for I^- A) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁵ B) [Xe] or 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶ C) [Xe] or 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²5p⁶ D) [Xe] or 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4f¹⁰5p⁶ E) None of the above

Question

Quizplus · Accepted Answer

The electron configuration of the given compound can be simplified by referring to the noble gas configuration of Xenon (Xe). The electron configuration of Xe is: 
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6

Therefore, the ground-state electron configuration of the given compound can be written as [Xe] or: 
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 5p3

The option B is the only one that includes the noble gas configuration [Xe].

Which, If Any, Is the Ground-State Electron Configuration for I-

Which, If Any, Is the Ground-State Electron Configuration for I^-