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GATE Study Material for Physical Chemistry (Chemical Bonding)

# Chemical Bonding
* Introduction
* The Ionic Bonds
* The Covalent Bonds
* The Polar Bonds
* Electronegativity
* Others Bonds

Covalent Bond
A Covalent Bond is formed due to sharing of electrons between two atoms.
When both the [...]

GATE Study Material for Physical Chemistry (Ionic Bonds)

The Ionic Bond
An ionic bond is formed by transfer of electrons from one atom to another atom in the molecule.
Consider the formation of potassium chloride. An electron is transferred from potassium atom to chlorine atom. The resulting K+ and Cl- ions possessing configuration of argon (2,8,8) combine to form an electrovalent compound as shown below [...]

GATE Study Material for Chemical Bonding Introduction

Introduction
The union of two or more atoms involving redistribution of electrons either by transfer or sharing between themselves, so that all of them acquire the stable noble gas configuration of minimum energy is known as chemical bonding.
The attraction between atoms within a molecule is called a chemical bond.

Electronic theory of valency :
The electronic theory leads [...]

GATE Study Material for Physical Chemistry (Orbital)

Orbitals
The region in the space around the nucleus where the probability of finding an electron is maximum is known as an orbital of that electron.
Actually, according to the concepts of wave mechanics (electron behaving as a wave), the negative charge of the electron is spread around the nucleus which is referred to as ’cloud of [...]

GATE Study Material for Physical Chemistry (Ions)

Ions
Looking back at Table 3 indicates that all atoms have equal number of protons (positively charged) and electrons (negatively charged) as a result of which the net charge in the atom is 0.
But when any atom gains or loses one or more electrons we get atoms with imbalance charge which are termed as ions. Ions [...]

GATE Study Material for Physical Chemistry (Radioactivity)

Radioactivity

In 1896, Henry Becquerel observed that the uranium salt was emitting a penetrating type of radiation spontaneously. A little later, Curie suggested that these radiations were from a uranium compound. He termed this an atomic phenomenon and named this Radioactivity.
The phenomenon of spontaneously emitting active radiations from an unstable atomic nucleus is called radioactivity. The [...]

GATE Study Material for Physical Chemistry (Atomic Weight)

Atomic Weights of An Elements
The atomic weight of an element is defined as a number which expresses the ratio of weight of one atom of an element to the weight of one atom of hydrogen.
Thus atomic weight is only a number. It has no units and it does not provide any information regarding the actual [...]

PNB Interview Schedule For The Post of Clerks

Interview Schedule For The Post of Clerks
Written Test held On 26.04.09
CLICK HERE CANDIDATE LIST AND SCHEDULE

Lucknow University B.A First Year Results

Lucknow University announced a B.A first year Examination Results 2009
CLICK THE BELOW LINKS YOU CAN GET THE BA FIRST YEAR RESULTS
Lucknow University B.A First Year Results

CET Delhi 2009 Results, Delhi Polytechnic Result 2009,delhi polytechnic entrance exam 2009,www.cetdelhi.nic.in

Here is an update from Delhi Department of Training and Technical Education regarding the results of Polytechnic CET 2009. The same will be announced on June 30th. The details will be posted on CET website at cetdelhi.nic.in.
Delhi Polytechnics CET 2009 is for Admission to Full-Time Diploma Programmes in technical institutions in Delhi. The Common Entrance [...]