what is meant by polar bonds, polar compounds and polarity

polar covalent bonds are those bonds in which electron spends more time near one of the element , these situation arises owing to diffrence in the electronegativity of the two concerned element , larger the diffrence in electronegativity , more polar the bond will be , 
due to this more electronegative element attain partial negative charge . 
polarity is a property related to separation of opposite charges in a molecule , the more electronegative atom acquires a partial -vbe charge and less one will partial +ve charge . 
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