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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The total number of electrons present in all the -orbitals, all the -orbitals, and all the -orbitals of the caesium ion are respectively **[DCE 2008]**

Answer: (B)

Solution

has 54 electrons, isoelectronic with Xe: . Summing:

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Question ID VK-132290