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Why do transition elements shows variabl...

Why do transition elements shows variable oxidation states?

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In the transition elements , the energies of `(n-1) d -orbitals and ns orbitals are very close. Hence , electrons from both can participate in bonding.
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Why do transition elements show variable oxidation state?

(a) Why do transition elements show variable oxidation states? (i) Name the element showing maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30). (ii) Name the element which shows only + 3 oxidation state. (b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.

(a) Describe the general trends in the following properties of the first series of the transition elements: (i) Stability of +2 oxidation state (ii) Formation of oxometal ions (b) Assign reason for each of the following: (i) Transition elements exhibit variable oxidation states. (ii)Transition metal ions are usually coloured

Give reason: (i) Transition metals show variable oxidation states. (ii) Actinoids show wide range of oxidation states.

Give reason for the following : (i) Mn shows the highest oxidation state of +7 with oxygen but with fluorine, it shows the highest oxidation state of +4 (ii) Transition metals show variable oxidation states. (iii) Actinoids show irregularities in their electronic configurations.

Explain the following (a) Zr and Hf exhibit similar properties. (b) Most of the transition elements show large number of oxidation states.

Assign reasons for each of the following (i) Trasitiono elements exhibit variable oxidation sates. (ii) Transition metal ions are usually coloured.

Why do alkali metals not show variable oxidation states ?

Which transition element does not exhibit variable oxidation state?

Which transition elements exhibit +8 oxidation state

RESONANCE ENGLISH-D BLOCK ELEMENTS-EXERCISE-3 PART-III
  1. What is the effect of increasing pH on K2Cr2O7 solution?

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  2. What is the basic difference between the electronic configurations of ...

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  3. Why do transition elements shows variable oxidation states?

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

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  5. The E^(@) value in respect of the electrodes chromium (Z=24), manganes...

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

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

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  8. Write all possible oxidation states of an element having atomic number...

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  9. Why is +2 oxidation state of manganese quite stable while the same is ...

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  10. How is the variability in oxidation states of transition metals differ...

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

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

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

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

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  15. How would you account for the fact that actinoids exhibit a larger num...

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  16. The weak acid, HA has a Ka of 1×10^(−9) . If 0.1 mol of this acid is ...

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  17. Explain the following observations: (i) Generally there is an increa...

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  18. How would you account for the following? (i)The atomic radii of the...

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  19. Explain the following : (i) Low spin octahedral complexes of nicke...

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  20. (a) Complete the following chemical equations: (i) Cr(2) O(7)^(2-)...

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