Characteristics and Properties of d and f Block Elements

The d-block elements have the following characteristics:

• They show variable oxidation states.
• They form colored compounds.
• They exhibit magnetic properties.
• They often act as catalysts in chemical reactions.

For the f-block elements, their characteristics include:

• They are known as inner transition elements.
• The lanthanides show a gradual decrease in atomic and ionic sizes, known as lanthanide contraction.
• Many f-block elements are radioactive (especially the actinides).
• They exhibit variable oxidation states, though +3 is common for lanthanides.