D-Block Elements

(3d series to be learnt precisely)

d- block elements are intermediate between highly electropositive s-block elements and highly electronegative p-block elements. The differentiating electron enters the d-orbital of the penultimate shell. d-block elements have partly filled (n-1) d-orbital. ... Zn, Cd, Hg & Uub should be excluded from d-block. But since their chemical properties are similar, they are considered as d-block elements.

Periods
3d Series : Sc(21) to Zn (30)

4d Series : Y (39) to Cd (Z=48)

5dSeries : La(57) to Hf(72) to Hg (80)

6d Series : Ac(89) to Rf(104) to Uub(112)

Colour
(excluding d-d transitions)