Podcast
Questions and Answers
Which lanthanoid metal is described as steel hard?
Which lanthanoid metal is described as steel hard?
- Dysprosium
- Samarium (correct)
- Europium
- Lutetium
Why do many trivalent lanthanoid ions exhibit coloration?
Why do many trivalent lanthanoid ions exhibit coloration?
- Due to their high reactivity in air
- Due to having narrow absorption bands
- Attributed to the presence of f electrons (correct)
- Because they are good conductors of heat
Which lanthanoid ions are paramagnetic?
Which lanthanoid ions are paramagnetic?
- Sm3+ and Tm3+
- Eu3+ and Gd3+
- La3+ and Ce4+
- Yb2+ and Lu3+ (correct)
What is the approximate first ionization enthalpy of the lanthanoids?
What is the approximate first ionization enthalpy of the lanthanoids?
Which lanthanoid metal has a melting point significantly higher than others?
Which lanthanoid metal has a melting point significantly higher than others?
What imparts a certain degree of stability to empty, half-filled, and completely filled f orbitals?
What imparts a certain degree of stability to empty, half-filled, and completely filled f orbitals?
Which statement best describes the trend in reactivity of actinoids as the atomic number increases?
Which statement best describes the trend in reactivity of actinoids as the atomic number increases?
What is the primary reason for the actinoid contraction across the series?
What is the primary reason for the actinoid contraction across the series?
Why is it considered unsatisfactory to review the chemistry of actinoids solely based on oxidation states?
Why is it considered unsatisfactory to review the chemistry of actinoids solely based on oxidation states?
How do the actinoid metals compare to lanthanoid metals in terms of appearance?
How do the actinoid metals compare to lanthanoid metals in terms of appearance?
Which factor contributes to the structural variability of actinoid metals?
Which factor contributes to the structural variability of actinoid metals?
Why do actinoids resemble lanthanoids in having more compounds in +3 state than +4 state?
Why do actinoids resemble lanthanoids in having more compounds in +3 state than +4 state?
