Question

what are transition elements why are they so called

Answer 1

This can be found in group 3 To 12


They are called d block elements because the electrons being added in this block ofelements are being added to the d orbitals.

Answer 2

The d- block elements that is the elements from group 3-12 are called transition elements.
This is because their physical and chemical properties are intermediate between s-block and p-block properties.
Hence these elements act as bridge from s-block to p-block and hence they are known as transition elements.