Which of these is an isoelectronic series? A)Na⁺,K⁺,Rb⁺,Cs⁺ B)K⁺,Ca²⁺,Ar,S²^- C)Na⁺,Mg²⁺,S²^-,Cl^- D)Li,Be,B,C E)none of these (A-D)

Question

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An isoelectronic series is a group of ions or atoms that have the same number of electrons. In option B, all the species have 18 electrons: - K⁺ (potassium sulfide cation and sulfur anion) - Ca²⁺ (calcium sulfide cation and sulfur anion) - Ar (argon atom, which has 18 electrons) - S²^- (sulfur anion, sulfur neutral atom, sulfur cation, and sulfur dianion, respectively)

Which of These Is an Isoelectronic Series