![• The first series consists of element from scandium
[Sc(21)] to zinc[Zn(30)] in which 3d orbitals are
progressively filled.
• The second series starts with yttrium[Y(39)] to
cadmium[Cd (48) in which 4d orbitals are
progressively filled.
• 3rd series consists of elements from lanthanum[La
(57)], hafnium [Hf (27)] to Mercury [Hg (80)] in
which the 5d orbitals are progressively filled](https://image.slidesharecdn.com/transitionelements-211019113326/85/Transition-elements-6-320.jpg)
![• The fourth series starts with actinium[Ac(89)]
where 6d orbital start feeling progressively but this
series is incomplete.](https://image.slidesharecdn.com/transitionelements-211019113326/85/Transition-elements-7-320.jpg)
Transition elements
- 1. •Name:- Harshada Pratap Waghmode TY B.Sc. B.Ed. Subject:- Inorganic chemistry Subject code:- B.Sc. 523 Subject incharge :- Mr. Sudarshan Tapsale
- 2. •Topic:- Chemistry of transition element 1. Introduction 2. Position in the periodic table 3. Electronic configuration
- 3. INTRODUCTION :- • The periodic table consists of different elements arranged on the basis of their atomic number. • This elements are mainly classified into four blocks with S-block, P-block, d-block, & f-block Elements on the basis of filling of the outermost shells.
- 4. • In d- block elements electron added to the penultimate shell i.e. (n -1)d shell, hence these elements are called as d-block elements. • The general electronic configuration of Transition Element is is (n-1)d1-10 ns1- 2 • The D block element are often called as Transition Element.
- 5. POSITION IN THE PERIODIC TABLE • The position of D block element in the periodic table is in between element of S block and element of P block. • This element Institute three complete rows of ten elements and fourth incomplete row of elements which are called as first, second, third and fourth transition series respectively.
- 6. • The first series consists of element from scandium [Sc(21)] to zinc[Zn(30)] in which 3d orbitals are progressively filled. • The second series starts with yttrium[Y(39)] to cadmium[Cd (48) in which 4d orbitals are progressively filled. • 3rd series consists of elements from lanthanum[La (57)], hafnium [Hf (27)] to Mercury [Hg (80)] in which the 5d orbitals are progressively filled
- 7. • The fourth series starts with actinium[Ac(89)] where 6d orbital start feeling progressively but this series is incomplete.
- 9. • From the table it is clear that the general electronic configuration for first transition series is 4s1-2 3d1- 10 • Second transition series is 5s1-2 4d1- 10 And that of third transition series is 6s1-2 5d1- 10 The elements chromium and copper show anomalous electronic configuration due to special stability for half-filled and full-filled orbitals respectively.