The electronic configuration for Ba2+ is: [Xe].
What is an electron configuration?
Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.
The electronic configuration of Ba is [Xe]6s2, but for [tex]Ba^{2+}[/tex] there will be two electrons less from Ba metal, and the valence shell will be 6s, so two electrons are removed from the 6s orbital.
So, the electronic configuration of [tex]Ba^{2+}[/tex]is
[tex]1s^22s^22p^63s^23p^63d^{10}4s^24p^64d^{10}5s^25p^65d^{10}.[/tex]
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