Position of d-block elements in the periodic table:
i. The d-block elements lie in between s- and p-block elements, i.e., these elements are located in the middle part of the periodic table.
ii. The d-block elements are present in 4th period (Sc to Zn, 10 elements), 5th period (Y to Cd, 10 elements), 6th period (La, Hf to Hg, 10 elements) and 7th period (Ac, Rf to Uub, 10 elements)
iii. d-block elements are present from group 3 to group 12.