Electronegativity

Electronegativity

1. Definition

   • Electronegativity is the ability of an atom to attract a pair of electrons in a covalent bond.

2. Intermolecular force

   • Van der Waal
     • All molecules have VDW force>>>>> electrons
     • Van der Waals' forces are attractive force between induced dipoles in neighbouring molecules
     • Causes?
       • By movement of electrons in the shell
       • by the movement of electrons in the shell and this movement unbalances the distribution of charge with the electron
       • At any moment, there will be an instantaneous dipole across the molecule.
       • The instantaneous dipole induces a dipole in neighbouring molecules, which in turn induce further dipoles on the neighbouring molecules. The small dipole attract on another causing weak intermolecular force
   • Permanent dipole
   • Hydrogen Bonding

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