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Why are the ionisation energies of 5d el...

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

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In the `5d` series, after lanthanum `(Z=57)`there is lanthanide contraction. As a result in each group the atomic size of `5d` element is small and its nuclear charge is large . Hence the ionisation energies of `5d` element are large than `3d` elements.
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RESONANCE-D BLOCK ELEMENTS-EXERCISE-I PART-I
  1. Which element among d-block element has(i) the lowest melting point an...

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  2. Why Zinc has lowest melting point in 3d series?

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  3. Why are the ionisation energies of 5d elements greater than 3d element...

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  4. K(2)PtCl(6) is a well known compound whereas corresponding Ni compound...

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  5. Why do transition elements show variable oxidation state?

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  6. What is the most common oxidation state of first transition series?

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  7. What is meant by disproportionation of an oxidation state ? Give an e...

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  8. Name the three factors which determine the stability of a particular ...

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  9. Why is the value for (Mn^(3+))/(Mn^(2+)) couple much more positive tha...

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  10. Most of transition , metals can display hydrogen from dilute acid. Why...

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  11. {:("Element",Cr,Mn,Fe),(E^(0)(M^(2+)//M),-0.90V,-1.18V,-0.4V),(E^(0)(M...

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  12. Which of the following ions would form (i) coloured and (ii) colourles...

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  13. Why Ti^(4) complex are diamagnetic?

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  14. A substance is found to hav a magnetic moments of 3.9BM.How many unpai...

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  15. Why do Mn(II) show maximum paramagnetic character amongst the bivalent...

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  16. Explain gives reason. (a) Transition metal and many of their compoun...

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  17. Explain why transition metals and their many compounds act as goodd ca...

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  18. A transition metal form alloys with other transition elements . Explai...

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  19. Describe The general characteristics of transition elements with speci...

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  20. What happen when CuSO(4) solution is treated with (excess of ammonia...

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