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JEE Main 2017 Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main 2017

Among the following species which option contains all isoelectronic species?

Answer: (4)

Solution

Isoelectronic species have the same number of electrons. Count them, remembering , , , . **Option (4):** ; ; ; . All ten —

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Question ID VK-115706