Orbit Overlap Concept
Orbit Overlap Concept
According to orbital overlap concept, the formation of a covalent bond between two atoms results by pairing of electrons present in the...
Valence Shell Electron Pair Repulsion Theory & Valence Bond Theory
Valence Shell Electron Pair Repulsion Theory
According to this theory,
The geometry of a molecule or ion depends on the number of...
Bond Parameters
Bond Parameters
Bond Length
Bond length is defined as the equilibrium distance between the nuclei of two bonded atoms in a molecule.
Bond length increases with increases...
Covalent Bond
Covalent Bond
A chemical bond formed between two atoms by mutual sharing of the electron between them so as to complete their octels or duplets...
Ionic or Electrovalent Bond
Ionic or Electrovalent Bond
A chemical bond formed by complete transference of elements from one atom (metal) to another (non-metal) and hence, each atom acquires...
Chemical Bond
Chemical Bond
The attractive force which holds various constituents (atoms, ions, etc.) together in different chemical species is called a chemical bond.
Modes of Chemical Composition
This...
Periodic Trends in Properties of Elements
Trends in Physical Properties
There are numerous physical properties of elements such as melting and boiling points, heats of fusion and vaporization, energy of atomization,...
Modern Periodic Table
Modern Periodic table (1913)
Mostly modified Mendeleev’s periodic law. He stated “Physical and chemical properties of elements are the periodic function...
Brief History of the Development of Periodic Table
Dobereiner’s Triads (1829)
Dobereiner classified the elements into groups of three elements with similar properties in such a manner so that the atomic weight of...
Filling of Orbitals in Atom
Filling of Orbitals in Atom
The filling of electrons into the orbitals of different atoms takes place according to the aufbau principle which is based...