Question

Write a note on the characteristics of the d-block elements.

Answer 1

• The d-block contains elements of the groups 3 to 12 which are all metals. They are also known as transition elements or transition metals.
• They form a bridge between chemically reactive s-block elements and less reactive elements of groups 13 and 14.
• Most of the d-block elements possess partially filled inner d orbitals. As a result, the d-block elements have properties such as variable oxidation state, paramagnetism, ability to form coloured ions. They can be used as catalysts.
• Zn, Cd, and Hg with configuration ns² (n-1)d¹⁰, (completely filled s and d subshells) do not show characteristic properties of transition metals as they are stable.

Answer 2

Properties of d-Block Elements

• These are metallic in nature.
• They are hard and have high densities.
• They have high melting and boiling point.
• They shows variable oxidation states.
• They form coloured ions and compounds.
• The atomic radii decreases with increase in atomic number.