Which of the following is not isoelectronic with O2

Foundation

Chemistry Foundation

Isotopes Isobars Isotones Isostere Isodiaphere

Question

Which of the following is not isoelectronic with O^2– ?

N^3–

All are isoelectronic

Na⁺

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Oxide ion (O^2–) contains 10 electrons. Na⁺, Ne and N^3– also contain 10 electrons. All of these have same number of electrons. Hence they are isoelectronic.

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