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 | Covalent
bond is formed between two atoms of nonmetals, whose mutual difference
in electronegativity is less than 1.7 in the Pauling scale. This limit is very conventional, and is rather indicative. The
electrons forming the bond shared items are shifted towards the atom
with greater electronegativity of the element, which makes it at the
same atom forms a partial negative electric charge, while the atom of
lower electronegativity creates a positive. Polar covalent bond is an electric dipole.
how to lose weight fast Covalent bonds can be further divided into normal, in which electrons are shared items come in equal numbers from both atoms (if one "gives" three electrons, the other also "gives" three) and coordination bonds, in which only one atom is an electron donor or number of electrons, which "gives" an atom is equal to the number that comes second. Coordination bindings are often exactly the same nature as covalent bonds. In many relationships, in which electrons from the account that is formally part of the covalent bonds, while another part of the coordination, they are completely indistinguishable, in fact, have the same geometry and energy, and virtually impossible to determine which are which. In many chemical compounds coordination bonds, however, can be clearly identified and they have some special properties that ordinary covalent bonds can not have. An example of such bonds shall be such as those occurring in Pi complexes. |
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