Answer» - 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.
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.
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