Sunday, 24 June 2018

D AND F BLOCK ELEMENTS NOTE BY PLANCESS

The elements which are present between s and p-block elements in the modern periodic table are called transition elements. Transition elements have partly filled (n-1) d-orbitals.


In transition elements the last electron enters penultimate d orbitals i.e. (n-1)d orbitals and that is why they are called d-block elements.

The general valence shell configurations of transition elements is  (n-1)d1–10.ns0, 1, 2. All the d-block elements are classified into four series viz 3d, 4d, 5d and 6d series corresponding to the filling of 3d, 4d, 5d and 6d orbitals.

f –block elements are also called inner transition elements. In these the last electron enters penultimate i.e. (n – 2)f f orbital. The differentiating electron in transition elements may enter either 4f or 5f orbitals based upon which they are differentiated into lanthanides and actinides.

NOTE: jigssolanki.in does not own this book, neither created nor scanned. We just providing the link already available on internet. If any way it violates the law or has any issues then kindly mail us: jigssolanki1995@gmail.com or Contact Us for this(Link Removal) issue.

Download Your Note

No comments: