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Question: Answered & Verified by Expert
If an atom has electronic configuration $1 s^2 2 s^2 2 p^6 3 s^2 3 p^6 3 d^3 4 s^2$, it will be placed in
ChemistryClassification of Elements and Periodicity in PropertiesJEE Main
Options:
  • A Second group
  • B Third group
  • C Fifth group
  • D Sixth group
Solution:
1916 Upvotes Verified Answer
The correct answer is: Fifth group
The outermost shell and one shell prior to it in d subshell, has total 5 electron so it will be placed in fifth group in transition element or 'd' block of periodic table.

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