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Grade 12Inorganic Chemistry

Why are the ionization energies of 5d elements greater than 3d elements?

Profile image of sumit kumar
16 Years agoGrade 12
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1 Answer

Profile image of SAGAR SINGH - IIT DELHI
15 Years ago

Dear student,

In the 5d-series of transitions elements, after lanthanum (La), the added electrons go to the next inner 4f orbitals. The 4f electrons have poor shielding effect. As a result, the outermost electrons experience greater nuclear attraction. This leads to higher ionisation energies for the 5d- series of transition elements.

 

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Sagar Singh

B.Tech, IIT Delhi