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In which of the following pairs are the ions isoelectronic?

Options

  1. AMg ²⁺, Ar
  2. BNa ⁺, O ²⁻
  3. CAl ³⁺, Cl ⁻
  4. DK ⁺, Ne

Correct answer

B. Na ⁺, O ²⁻

Step-by-step solution

Isoelectronic refers to two atoms, ions or molecules that have the same electronic structure and the same number of valence electrons. Isoelectronic ions are ions that have the same number of electrons. There are many ions that are isoelectronic. Examples of Isoelectronic Ions and Elements: He , Li ⁺, He , Be ²⁺, Ar , S ^2-, Na ⁺, Mg ²⁺ .

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