7 public questions tagged with this topic.
Lanthanoids are not highly volatile; they have high melting points.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Lanthanoids - Electronic Configuration and Lanthanoid Contraction
Cerium (Ce) exhibits +4 oxidation state due to the stability of empty 4f orbitals (4f 0 ).
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Lanthanoids - Electronic Configuration and Lanthanoid Contraction
Lanthanoid contraction is the gradual decrease in atomic/ionic radii across the lanthanoid series.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Lanthanoids - Electronic Configuration and Lanthanoid Contraction
Yb 2+ has f 14 configuration which is stable due to completely filled f-orbitals.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Lanthanoids - Electronic Configuration and Lanthanoid Contraction
Lanthanoids primarily exhibit +3 oxidation state. Only a few elements like Eu and Yb show +2 oxidation state. Therefore, the statement that they primarily exhibit +2 oxidation state is incorrect.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Lanthanoids - Electronic Configuration and Lanthanoid Contraction
Lanthanoids are used in alloys, catalysts, and phosphors, but not as primary structural materials.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Applications of d and f Block Elements
Lanthanoids are not used as structural building materials due to their softness and high reactivity.
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Applications of d and f Block Elements
