Define Representative Elements & Transition Elements.

Define Representative Elements & Transition Elements.
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Answer :

Ans : Representative Elements :
The elements of Sub Group A are called Main Or representative Elements. The properties of these elements are represented by their valency electrons.
Transition Elements :
(1) The elements of Sub Group B are called Transition Elements.
(2) In these elements besides the valence shell the penultimate shell is also incomplete.
(3) They show more than one valence in chemical reactions.
(4) These elements show their characteristic colours in compounds.
(5) There are two types of transition elements.
 a) Outer Transition or d - block Elements b) Inner Transition or f - block Elements.
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