All the following can have the ground-state electron configuration [Xe]4f¹⁴5d¹⁰ except A) Pb⁴⁺. B) Hg²⁺. C) Bi⁵⁺. D) Tl⁺. E) Au⁺.

Question

Quizplus · Accepted Answer

The electron configuration [Xe]4f¹⁴5d¹⁰ belongs to the element Tl (thallium). The other options in the answer choices have the same electron configuration, but they are not correct because they do not correspond to the electron configuration of any stable element. Tl⁺., on the other hand, corresponds to the stable ion of thallium, which has lost one electron from the outermost p sub-level.

All the Following Can Have the Ground-State Electron Configuration [Xe]4f145d10

All the Following Can Have the Ground-State Electron Configuration [Xe]4f¹⁴5d¹⁰