Magnetic Property of Transition Metals –

 

Magnetic Property of Transition Metals –

    ·      Diamagnetic substances contain electron pairs with opposite spins and are repelled by applied magnetics filled.

 Ex.: Ti⁺⁴,------ [Ar] 3d⁰4s⁰  ----- no of unpaired electron ----->Zero---> Diamagnetic 

         V⁺⁵,-----[Ar] 3d⁰4s⁰  -----no of unpaired electron ----->Zero---> Diamagnetic 

        Sc³⁺ ------[Ar] 3d⁰4s⁰  ------no of unpaired electron ----->Zero---> Diamagnetic 

        Zn  --------[Ar] 3d¹⁰4s² ------no of unpaired electron ----->Zero---> Diamagnetic 

         Hg---------[Ar] 3d¹⁰4s² ------no of unpaired electron ----->Zero---> Diamagnetic 

        Cd  ------- [Ar] 3d¹⁰4s²  ------ no of unpaired electron ----->Zero---> Diamagnetic

 

     ·      Paramagnetic substances contain unpaired electron spins or unpaired electrons and are attracted strongly in applied magnetic field.

 Sc^2+, ---------[Ar] 3d¹4s⁰ ------no of unpaired electron ----->1e^- ---> paramagnetic

Cr³⁺ ---------[Ar] 3d³4s⁰ ------no of unpaired electron ----->3e^- ---> paramagnetic

    ·      Paramagnetic character increase with increase in no of unpaired electron.

·      Each unpaired electron having magnetic moment associated with its spin angular momentum and orbital angular momentum.so magnetic momentum can be calculated based on spin only formula

    µ=  √n(n+2)  B.M. (Bohr Magnetons)