Question

Which one of the following does not have [Xe] as its electronic configuration?

Multiple Choice
Ba2+
Te2–
Cs+
I–
Sn4+

Answer 1

The ion that does not have [Xe] as its electronic configuration is
`Sn^{4+`. Option D

What is the configuration?

Sn4+ is the only ion among the ones provided whose electronic configuration does not include [Xe]. Tin (Sn) has the electronic configuration [Kr] 4d¹⁰ 5s² 5p²; it achieves this configuration when it loses four electrons to form the
`Sn^{4+`ion.

In contrast, after gaining or losing electrons, the ions
`Ba^{2+`,
`Te^{2-`,
`Cs^+`, and
`I^-`all reach configurations that include [Xe]. In their individual ion configurations, the noble gas xenon's electronic structure is retained by the (barium), (tellurium), (celesium), and (iodine) ions.