d and f BLOCK ELEMENTS Quiz

• Their high melting points
• Their radioactivity
• Irregularities in metallic radii which are greater than in lanthanoids
• Their similar densities

• They are brightly colored
• They are dull and black
• They are silvery in appearance
• They are transparent

• Oxidation states are difficult to measure
• All actinoids have the same oxidation states
• Oxidation states are not important for actinoids
• The distribution of oxidation states is uneven and different for earlier and later elements

• Last half
• Throughout the entire series
• First half
• Only in the middle elements

• +2
• +3
• +4
• +5