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Question: Answered & Verified by Expert
The number of d-electrons in Fe2+ (Z = 26) is not equal to the number of electrons in which one of the following?
ChemistryClassification of Elements and Periodicity in PropertiesNEET
Options:
  • A p-electrons in Cl (Z = 17)
  • B d-electrons in Fe (Z= 26)
  • C p-electrons in Ne (Z = 10)
  • D s-electrons in Mg (Z = 12)
Solution:
1757 Upvotes Verified Answer
The correct answer is: p-electrons in Cl (Z = 17)
Fe2+=3d6 (number of 'd' electrons = 6)
In Cl =1s22s22p62s23p5 (number of 'p' electrons = 12)
In Fe (number of 'd' electrons = 6) and in Mg ((number of 's' electrons = 6)

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