4f And 5f Block Elements
4f and 5f block elements
1. Name the 4f – block elements and give their electronic configuration. Why are Sc, Y, and La included in the list of lanthanide elements
2. What is lanthanide contraction? How does it affect the chemical behavior of Zr/Hf, Hb/Ta, Mo/W ?
3. Contrast the electronic spectra of the lanthanide and transition metal ions. Why do the lanthanide ions give rise to very sharp bands in their electronic spectra and why are the magnetic properties of their complexes little affected by the nature of ligands.
4. Give a brief account of separation of lanthanide elements
5. Name one lanthanide which does not occur in lanthanide mineral. How was it discovered and isolated?
6. Name the source mineral of rare earths and comment on its relative abundance.
7. Compare the electronic structures of Actinides with those of Lanthanides and comment on their bonding
8. Compare and contrast the pyramid of oxidation states found in the first row of the transition elements with the oxidation states found in lanthanides and actinides
9. Write the number of unpaired electrons in La3+, Ce4+, Lu3+, Yb3+, Gd3+, Eu2+, Pu4+, U6+.
10. Why is thorium considered important from industrial view point?
11. What is the major source of Th? How is it extracted from this mineral? (Give guide only)
12. Discuss the position of Th and U in the Periodic table
13. Name two important minerals of uranium. Starting from one of these, outline a scheme for extraction of U and production of U3O8
14. Why is U deemed to be the key metal in nuclear industry?
15. How is UF6 produced? What is its importance?
16. Draw the structure of UO2(NO3)2.2H2O
17. How are Nb, Pu and Am prepared?
18. Outline a scheme for separation of Pu from U and F.P. in irradiated nuclear fuel (U).
19. Which actinide isotopes are available in (a) tons, (b) kilograms, (c) gram quantities
20. Comment on extension of the Periodic table beyond element 100, Fm.
21. What are inner transition elements? Why are they so called?
22.
1. Name the 4f – block elements and give their electronic configuration. Why are Sc, Y, and La included in the list of lanthanide elements
2. What is lanthanide contraction? How does it affect the chemical behavior of Zr/Hf, Hb/Ta, Mo/W ?
3. Contrast the electronic spectra of the lanthanide and transition metal ions. Why do the lanthanide ions give rise to very sharp bands in their electronic spectra and why are the magnetic properties of their complexes little affected by the nature of ligands.
4. Give a brief account of separation of lanthanide elements
5. Name one lanthanide which does not occur in lanthanide mineral. How was it discovered and isolated?
6. Name the source mineral of rare earths and comment on its relative abundance.
7. Compare the electronic structures of Actinides with those of Lanthanides and comment on their bonding
8. Compare and contrast the pyramid of oxidation states found in the first row of the transition elements with the oxidation states found in lanthanides and actinides
9. Write the number of unpaired electrons in La3+, Ce4+, Lu3+, Yb3+, Gd3+, Eu2+, Pu4+, U6+.
10. Why is thorium considered important from industrial view point?
11. What is the major source of Th? How is it extracted from this mineral? (Give guide only)
12. Discuss the position of Th and U in the Periodic table
13. Name two important minerals of uranium. Starting from one of these, outline a scheme for extraction of U and production of U3O8
14. Why is U deemed to be the key metal in nuclear industry?
15. How is UF6 produced? What is its importance?
16. Draw the structure of UO2(NO3)2.2H2O
17. How are Nb, Pu and Am prepared?
18. Outline a scheme for separation of Pu from U and F.P. in irradiated nuclear fuel (U).
19. Which actinide isotopes are available in (a) tons, (b) kilograms, (c) gram quantities
20. Comment on extension of the Periodic table beyond element 100, Fm.
21. What are inner transition elements? Why are they so called?
22.