Chemical bonding unequal electronegativities

As will be seen in the next section, electrons are often shared unequally between atoms in chemical bonds. The electronegativity conc t is useful in dealing with this important phenomenon in chemical bonding. 

Chemical bonds hold groups of atoms together. They can be classified into several types. An ionic bond is formed when a transfer of electrons occurs to form ions in a purely covalent bond, electrons are shared equally between identical atoms. Between these extremes lies the polar covalent bond, in which electrons are shared unequally between atoms with different electronegativities. 

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