Which of the following is not isoelectronic w | vedclass

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(D) Isoelectronic species are those that have the same number of electrons.For $O^{2-}$,the atomic number of oxygen is $8$. Since it has a charge of $

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$Ca^{2+}$

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(D) Isoelectronic species are those that have the same number of electrons.For $O^{2-}$,the atomic number of oxygen is $8$. Since it has a charge of $-2$,the number of electrons is $8 + 2 = 10$.Now,let us calculate the number of electrons for each option:$A) N^{3-}: 7 + 3 = 10$ electrons.$B) F^{-}: 9 + 1 = 10$ electrons.$C) Ne: 10$ electrons.$D) Ca^{2+}: 20 - 2 = 18$ electrons.Since $Ca^{2+}$ has $18$ electrons,it is not isoelectronic with $O^{2-}$.

Which of the following is not isoelectronic with $O^{2-}$?

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