Which of the following have the same number of unpaired electrons in '

1.	Which of the following have the same number of unpaired electrons in 'd' orbitals
Answer» Cr Mn `Fe^(3+)` `Co^(3+)` SOLUTION :Cr, Mn and `Fe^(3+)` have 5 UNPAIRED ELECTRON in d-orbitals `._24Cr=3d^5 4s^1 =5` `._25Mn=3d^5 4s^2 =5` `._26Fe^(3+)=3d^5 4s^0=5`

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