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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

Which one of the following sets of ions represents a collection of isoelectronic species? **[AIEEE 2006]**

Answer: (A)

Solution

all have 18 electrons. In (b), has 18 electrons but (54), (36) and (18) are not all

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Question ID VK-132144