d and f BLOCK ELEMENTS Quiz

• Uranium
• Plutonium
• Lawrencium
• Neptunium

• Their extremely high melting points
• Their inherent radioactivity
• Significant and irregular variations in their metallic radii
• Their similar atomic densities

• They are brightly colored
• They are dull and black in appearance
• They generally have a silvery metallic appearance
• They are transparent

• Oxidation states are difficult to measure accurately
• All actinoids possess identical oxidation states
• Oxidation states are not the primary factor in actinoid chemistry
• The stability and occurrence of specific oxidation states differ significantly between early and late actinoids

• The last half of the series
• Throughout the entire series uniformly
• The first half of the series
• Only in the middle elements