Question
Write a note on the characteristics of the $d-$block elements.
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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 $ns^2 (n-1)d^{10}, ($completely filled $s$ and $d$ subshells$)$ do not show characteristic properties of transition metals as they are stable.
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 $ns^2 (n-1)d^{10}, ($completely filled $s$ and $d$ subshells$)$ do not show characteristic properties of transition metals as they are stable.
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