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Explain why transition elements have man...

Explain why transition elements have many irregularties in their electronic configuration.

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In the transition elements, the `( n-1)` d subshell and ns subshell have very small difference in energy incoming electron may enter into ns or ( n-1) d subshell . Hence, they show irregularities in their electrons configurations.
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PRADEEP-D- AND F-BLOCK ELEMENTS-CONCEPTUAL QUESTIONS
  1. Though copper , silver and gold have completely filled sets of d-orbit...

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  2. Name the elements which are not really transition elements but are dis...

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  3. Explain why transition elements have many irregularties in their elect...

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  4. Explain why Fe is a transitioin metal but Na is not ?

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  5. Why is there striking similarities ( horizontal and vertical ) in succ...

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  6. Why do the transition metal ions have high enthalpy of hydration ?

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  7. Why the properties of third transition series are very similar to seco...

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  8. Chromium is a typical hard metal while mercury is a liquid.

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  9. The melting and boiling points of Zn , Cd and Hg are low. Why ? Or W...

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  10. The second ionisation enthalpies of both Cr and Cu are higher than tho...

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

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  12. Most of the transition metals do not displace hydrogen from dilute aci...

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  13. Explain why E^(@) for Mn^(3+)//Mn^(2+) couple is more positive than th...

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  14. The E^(@) value in respect of the electrodes (Z=24), manganese (Z=25) ...

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  15. Why do transition elements show variable oxidation state?

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  16. How is the variability in oxidation states fo transition metals differ...

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  17. Among lanthanoids, Ln (III) compounds are predominant. However, occasi...

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  18. How would you account for the fact that the transition metals and thei...

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  19. Why generally there is an increase in density of elements from titani...

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  20. Giving reasons indicate which one of the following would be coloured ?...

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