d and f BLOCK ELEMENTS Quiz

• Early actinoids are more like lanthanoids.
• Later actinoids are less like lanthanoids.
• Lanthanoid-like behavior becomes evident only in the second half.
• All actinoids behave like lanthanoids.

• It makes 5f electrons easier to remove.
• It leads to greater shielding and lower ionization enthalpies.
• It makes actinoids larger than lanthanoids.
• It causes higher electronegativity.

• Finely divided metals have different crystal structures.
• Finely divided metals have lower density.
• Increased surface area allows more reaction sites.
• Finely divided metals have higher melting points.

• Early actinoids are more magnetic.
• Early actinoids are less magnetic.
• The text focuses on the comparison with lanthanoids, not within the actinoid series.
• Early actinoids follow the same trend as late actinoids.

• Steel production uses different ores.
• Iron production involves adding alloying metals.
• Steel production involves adding specific amounts of carbon and alloying metals.
• There is no structural difference.