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Though copper , silver and gold have com...

Though copper , silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

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These metals in their common oxidation states have incompletely filled d-orbitals, e.g., `Cu^(2+)` has `3d^(9)` and `Au^(3+)` has `5d^(8)` configuration.
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(a) Account for the following : (i) Mn_(2)O_(7) is acidic whereas MnO is basic. (ii) Though copper has completely filled d-orbital (d^(10)) yet it is considered as a transition metal. (iii) Actinoids show wide range of oxidation states. (b) Write the preparation of potassium permanganate from pyrolusite ore (MnO_(2)) .

(i) Give the general electronic configuration of d-block elements, (ii) Silver atom has completely filled d-orbitals (4d^10) in its ground state. Yet, it is considered as transition element. Why? (iii) Cu^+ ion is not stable in aqueous solution. Explain. (iv) Actinoids contraction is greater from element to element than lanthanoid contraction. Why?

Which of the following has completely filled d-orbital?

Silver atom has completely filled d orbitals (4d^(10)) in its ground state. How can you say it is a transition element?

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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