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Dear Sir / Mam, What is exact difference between Polar covalnet and non polar covalemt bond?
Asked by suvarna | 21 Nov, 2018, 03:39: PM
answered-by-expert Expert Answer
The polarity of a covalent bond depends upon the electronegativity of the bonded atoms. If the electronegativity difference is more than 0.3, the bond is polar covalent bond otherwise non-polar.
Atoms of the same element attract electrons equally. So, when a covalent bond is formed between two atoms of the same element; the electrons are shared equally between the two atoms, the molecule is non-polar. Example: Cl2, Br2
 
Polar covalent bond is formed between two atoms of different elements.  So, the shared pair of electrons does not lie exactly midway between the two atoms. In facts, and it lies more towards the atom which is more electronegative. The atom with higher affinity for electrons develops a slight negative charge and atom with lesser affinity for electrons a slight positive charge. Example: HCl, HF
Answered by Ramandeep | 22 Nov, 2018, 09:26: AM

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