Electronic Configurations of elements and s,p,d,f-Block Elements

s - block : 
electron enters into 's' orbital
GEC = ns^{1 − 2}
it consists I A and II A
I A - Alkali metals (GEC = ns¹)
II A - Alkaline earth metals (GEC = ns²)
High electropositive metals

p - block :
the electron enters into 'p' - orbital
GEC = ns²np^{1 − 6}
6 Groups → III A, IV A, VA, VI A, VII A and Zero groups

d - block :
In which electron enters into d - orbital
GEC = (n − 1)d^{1 − 10} ns^{1 − 2}
3d - series Sc (Z = 21) — Zn (Z = 30)
4d - series Y (Z = 39) — Cd (Z = 48)
5d - series La (Z = 57) — Hg(Z = 80) * (58 - 71)
6d - series Ac (Z = 89)

f- block :
differentiating e⁻ enters into f - orbital
GEC : (n − 2)f^{1 − 14} (n − 1)d^{0 − 1} ns²
→ Consists of two f - series
4f : Ce (58) — Lu (71)
5f : Th (90) — Lr (103)

Representative elements :
GEC : ns^{1 − 2} np^{0 − 5}
In which outer most shells are incompletely filled
All 's' and 'p' block elements except noble gases

Transition elements :
General electronic configuration : (n − 1)d^{1 − 10} ns^{1 − 2}
Incompletely filled outermost n^th
penultimate (n − 1)
Anti penultimate (n − 2)
elements having incompletely filled are called " d - orbitals "

Note : except IIB group elements all d - block elements are transition.

Inner transition elements :
GEC (n − 2)f^{1 − 14} (n − 1)d^{0 − 1} ns²
Classified into two types.
4f - block elements :
Lanthanides / Lanthanoids / 4f - series / rare earths
from Ce (Z = 58) → Lu (Z = 71)

5f - block elements :
Actinides / Actinoids / 5f - series
from Th (Z = 90) → Lu (Z = 103)
→ Artificially synthesized
→ Radio active
→ Trans uranic elements - elements that come after uranium (Z = 92)