Discuss the main characteristics of four blocks of elements in the periodic table? Give their general electronic configuration.



Q.53:- Discuss the main characteristics of four blocks of elements in the periodic table? Give their general electronic configuration.

 

Answer:-
s-block elements:

  • They are highly reactive elements and thus occurs in combined state. On moving down the group their reactivity increases.
  • They have good reducing characters.
  • They generally form electropositive ion by losing 1 or 2 electrons, that’s why they are electro positive in nature.
  • They are good conductors of heat and electricity.

p-block elements:

  • Most of the p-block elements show variable oxidation states.
  • They include both metals and non-metals.
  • They are generally covalent in nature.
  • As move from left to right the non-metallic character of the element increases.
  • On moving down the group metallic character increases.

d-block elements:



  • d-block elements show variable oxidation states.
  • They are generally paramagnetic in nature.
  • Their compounds are generally coloured. Those which form complex compounds.
  • Most of the elements and their compounds acts as catalyst.

f-block elements:

  • They are generally heavy metals having high melting and boiling points.
  • Their compounds are generally coloured.
  • Variable oxidation states are generally shown by these elements.
  • Most of Activities are radioactive.

General electronic configuration:
s-block —ns1-2
p-block —ns2 np1- 6
d-block —(n -1) d1 -10 ns0-2
f-block —(n – 2)f0-14 (n -1) d0- 1 ns2