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QJEEM19Ch3ef1: JEE Main 2019 Chemistry - Class 12 JEEM19Ch3ef1 Solution: The 71 st electron of an element X with an atomic number of 71…

The 71st electron of an element X with an atomic number of 71 enters into the orbital :

Multiple Choice Options

  • A 4f
  • B 6s
  • C 6p
  • D 5d

Step-by-Step Verified Solution

In lutetium (71Lu) the 71st electron enters in 5d-orbital.

Electron configuration is [Xe]4f145d16s2

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