Podcast
Questions and Answers
What causes the almost identical radii of Zr and Hf?
What causes the almost identical radii of Zr and Hf?
- Lanthanoid expansion
- Atomic number increase
- Lanthanoid contraction (correct)
- Transition series expansion
What is the predominant oxidation state for lanthanoids according to the text?
What is the predominant oxidation state for lanthanoids according to the text?
- +3 (correct)
- +4
- +5
- +2
Which lanthanoid exhibits both +2 and +3 oxidation states?
Which lanthanoid exhibits both +2 and +3 oxidation states?
- Dysprosium
- Samarium
- Promethium
- Europium (correct)
Why does Ce(IV) form favorably in compounds according to the text?
Why does Ce(IV) form favorably in compounds according to the text?
Which lanthanoid exhibits the +4 oxidation state only in oxides?
Which lanthanoid exhibits the +4 oxidation state only in oxides?
Which electronic configuration is common among lanthanoids?
Which electronic configuration is common among lanthanoids?
What is the general formula for the electronic configurations of tripositive ions of lanthanoids?
What is the general formula for the electronic configurations of tripositive ions of lanthanoids?
What is the cause attributed to the overall decrease in atomic and ionic radii from lanthanum to lutetium?
What is the cause attributed to the overall decrease in atomic and ionic radii from lanthanum to lutetium?
What is unique about the lanthanoid contraction compared to an ordinary transition series?
What is unique about the lanthanoid contraction compared to an ordinary transition series?
What effect does an increase in nuclear charge have along the lanthanoid series?
What effect does an increase in nuclear charge have along the lanthanoid series?
