Question

What are the other names for elements of $d - $ block and $f - $ block?

Answer 1

Hint: The $d - $ block of the periodic table includes group $3$ to group $12$ . The elements present in the group $3 - 12$ are known as $d - $ block elements. $f - $ block elements are placed separately at the bottom of the periodic table.

Complete answer:
The $d - $ block elements are also known as transition elements. Transition elements also called transition metals have partially filled $d - $ orbitals. So, transition elements which are placed in between the $s - $ block and $d - $ block elements in the modern periodic table. Transition elements form coordination compounds or coordination complexes. They form colored compounds. They show high melting and boiling points and also high densities. The $f - $ block elements are also known as inner transition elements. They include lanthanoids and actinoids. The elements of the lanthanide series have a silvery appearance and are soft. They can even be cut by a knife. Some elements of this series are very reactive while some are very less reactive. These elements have high melting and boiling points. The elements of the actinide series are radioactive. These elements are electropositive and they react with many nonmetals. These metals are soft like lanthanides.
Therefore, the $d - $ block elements are known as transition elements and the $f - $ block elements are known as inner transition elements.

Note:
The transition elements show transition from metals to nonmetals in the periodic table, so they are called transition elements. Note that the $d - $ block elements are divided into four series: first transition series, second transition series, third transition series and fourth transition series.