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The size of the trivalent cations in the...

The size of the trivalent cations in the lanthanoid series decreases steadily as the atomic number increases. What is this known as ?

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Lanthanide contraction.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Short Answer Type
  1. In the transition element series starting from lanthanun (""(57)La), t...

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  2. Why does vanadium pentoxide acts as a catalyst?

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  3. The size of the trivalent cations in the lanthanoid series decreases s...

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  4. Give the general electronic configuration of actinoids

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  5. Write any two uses of pyrophoric alloys.

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  6. What is the maximum oxidation state in actinoids?

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  7. Name one ore each of manganese and chromium.

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

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

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

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  11. Why do transition elements show similarities along the horizontal peri...

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  12. Out of Al, Zn, Mg and Fe which is the densest element?

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

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  14. Explain why transition elements have many irregularities in their elec...

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  15. Explain the following : The paramagnetic character in 3d-transition ...

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  16. Scandium forms no coloured ions, yet it is regarded as a transition el...

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  17. Assertion : Hydrochloric acid is not used to acidify a KMnO(4) solutio...

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  18. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

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  19. Why is the separation of lanthanide elements difficult?

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  20. Account for the fact that second ionization energies of both Cr and Cu...

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