ChemistryRythm

  COVALENT BOND: INTRODUCTION: Langmuir (1919) refined the Lewis postulation by abandoning the idea of the stationary cubical arrangement of the octet and by introducing the term covalent bond.    The Covalent bond is also known as ELECTRON-PAIR BOND.    The attractive force between atoms created by sharing of an electron-pair. The compound containing a covalent bond are called COVALENT   COMPOUND CONDITION FOR FORMATION OF COVALENT BOND: a. NUMBER OF VALENCE ELECTRON:   (i.e).   Each of the atoms  A and B  should have 5,6, or 7 valence electrons so that both achieve the  stable octet easily by sharing  3,2 or 1  electron.   b. EQUAL ELECTRONEGATIVITY : The atom A will not transfer electrons to B if both have equal electronegativity , and hence electron sharing will take place. This can be strictly possible only if both the atoms are of the same elements.   c. EQUAL SHARING OF ELECTRON :     ...

  2.CHEMICAL BONDING The interatomic attractive forces which hold the constituent (atom/ ions) together in a molecules are called chemical bonds The interatomic attractive forces which hold the constituent (atom/ ions) together in a molecules are called chemical bonds . The chemical bonding can be classified on  the nature of the interaction between the bond. And it is mainly classified into two types                                       a.  Ionic Bond  – (Metal + Non- Metal)                                       b.  Covalent Bond  – (Compound of non-metal)           2.1. INTRODUCTION: A logical explanation for chemical bonding was proved by KOSSEL and LEWIS in 1916 . They approach to chemical bonding based on the inertness of the noble ga...

 USES OF GROUP-1 AND GROUP-2 ALKALI METAL:   a.       LITHIUM:         It is used for Anti Depression.         It is mainly used in manufacturing batteries.                                                            b.      SODIUM :                  It is used in street lamp.        It is mainly used as table salt.   c.       POTASSIUM:         It is used in manufacturing fertilizer, soap.   d.      RUBIDIUM: ...