Lewis Acids and Lewis Bases
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During the formation of coordinate covalent bonds,
one of the two atoms that are involved in forming the bond provides both
electrons of the electron pair that bonds the atoms together. Both of
these atoms, respectively, a base and an acid, according to the Lewis
Theory of acids and bases. A Lewis Base is an ion or a molecule
that helps in providing an electron pair. A Lewis Acid however, is
a molecule or ion that accepts the pair
of electrons to form the bond.