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On what ground can you say that scandium...

On what ground can you say that scandium `(Z=21)` is a transition element but zinc `(Z=30)` is not?

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On the basis of incompletly filled `3`d orbitals of Scandium , `[Ar]^(18) 3d^(1) 6s^(2)` and completely filled `3`d orbitals of Zn,`[Ar]^(18) 3d^(1) 4s^(2)`, they are consider transition and non-transition element respectively.
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RESONANCE-D BLOCK ELEMENTS-EXERCISE-3 PART-III
  1. On what ground can you say that scandium (Z=21) is a transition elemen...

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  2. (a) of the ions A^(+),CO^(2+) and Ti^(+), which one will be coloured i...

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  3. Name one ore each of manganese and chromium.

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  4. In the transition series with an increase in atomic number, the atomic...

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  5. Why Zr and Hf or Nb and Ta exhibit similar properties? Or Zirconium ...

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  6. Why among the lanthanides Ce,(III), can be easily oxidised to Ce(IV) (...

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

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  8. What is the effect of increasing pH on K2Cr2O7 solution?

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  9. What is the basic difference between the electronic configuration of t...

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  10. Why do transition elements show variable oxidation state?

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  11. Give reasons for each of the following: (i) Size of trivalent lantha...

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

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  13. The outer electronic configuration of two members of the lanthanoid se...

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  14. Assign reason for each of the following statement: (i) The largest n...

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  15. Write all posible oxidation state of an element having atomic number 2...

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  16. Why is +2 oxidation state of mmanganese quite stable while the same is...

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

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  18. Write the electronic configuration of the element with atomic number 1...

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  19. (a) Describe the general trends in the following properties of the fir...

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

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  21. Assign reasons for the following : (i) The enthalpies of atomisatio...

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