1. Tardigrade
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  3. Chemistry
  4. In the following sets of ions, which one is not isoelectronic with the rest of the species? O2-, F- , Na, Mg2+, Al3+, Ne

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Q. In the following sets of ions, which one is not isoelectronic with the rest of the species?
$ O^{2-}, F^- , Na, Mg^{2+}, Al^{3+}, Ne $

COMEDKCOMEDK 2014Structure of Atom

Solution:

${ O^{2-} (10e^-), F^-(10 e^-), Na(11 e^-), Mg^{2+}(10 e^-), Al^{3+}(10 e^-) }$ and ${Ne(10 e^-)}$ .
Thus, Na is not isoelectronic with the rest of the species.