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How Electronegativity helps us to understand the nature of bond       

                                                                                                                                                                    

To understand how electronegativity helps us to understand the nature of bond we need to know about electronegativity.
                                ” Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.”

Periodic Trend:

On periodic table electronegativity generally increase as we move from

left to right across a period and decrease as we move down a group .As a result ,the most electronegative group found on the top right of periodic table , and the least electronegative group found on left bottom ‘

Now we come to our question there are three conditions:

1)      Similar Electronegativity

2)      Electronegativity less than 1.7 in pauling scale

                                                                                            

1)      Similar Electronegativity :

If bounded element has similar Electronegativity, that is equal tendency to attract bonding electrons, the bond between them will be fairly covalent in nature, which means both have 50% share of bonding electrons.

2)      Electronegativity  less then 1.7 in pauling scale

If bounded element has Electronegativity difference less than 1.7 in Pauling scale, the more electronegative element gets more than 50% share of bonding electron and bond will be partly ionic and partly covalent in nature. Which means bond developed polar character, like in case of water molecule.

3)      Electronegativity difference more than 1.7 pauling scale

The more Electronegative element gets 100% share of bonding electrons and the bond will be purely ionic in nature.

👇Pauling Scale

Pauling scale is a numerical scale of electronegativity based on bond energy calculations for different elements joined by covalent bonds.