Seminar Topics & Project Ideas On Computer Science Electronics Electrical Mechanical Engineering Civil MBA Medicine Nursing Science Physics Mathematics Chemistry ppt pdf doc presentation downloads and Abstract

The d-BLOCK ELEMENT


[attachment=65031]

d-block element

The last element enters to d-orbital of penultimate shell.
ie,
The last element goes to (n-1)d orbital
Atoms or ions have partly filled d orbital(sub-shall)

Classification of d-block elements

3d series of first transition series
sc-21 to zn-30
.4d series of second transition series
y-39 to cd-48
.5d series of third transition series
La-57&Hf-72 to Hg-80
.6d series of fourth transition series
Ac-89&Rf-104 to 112 incomplete

Metallic Character

All the transition element are metals since the number of eletrons in the outermost shall is very small
The are hard, malleable and ductile
The presence of partially d-orbital
favours covalent bonding
.The metals are good conductors of heat and electricity


Paramagnetic substances:

*The paramagnetic character arises because of the presence of unpaired of electrons
*The substances which are Attracted by Magnetic field

Diamagnetic substances:

diamagnetic character because of the absence of unpaired electrons
The substance which repelled by the magnetic field