1. Tardigrade
  2. Question
  3. Chemistry
  4. The 71st electron of an element X with an atomic number of 71 enters into the orbital :

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The $71^{st}$ electron of an element $X$ with an atomic number of $71$ enters into the orbital :

JEE MainJEE Main 2019Classification of Elements and Periodicity in Properties

Solution:

Electronic Configuration of Element X with atomic number 71 is $[ Xe ] 4 f ^{14} 6 s ^{2} 5 d ^{1}$.
The Last electron will enter in $5 d$ orbital.