These two types of bond may seem different from each other, in reality iodized water they are very

These two types of bond may seem different from each other, in reality iodized water they are very similar: only changes the degree of sharing of electrons. In pure ionic bonding electrons of the atom less electronegative are literally iodized water torn from the atom more electronegative iodized water than that draws them all to itself, resulting in a potential difference at the two sides of the molecule that is a dipole. The force which holds together the atoms in the ionic bond is therefore of electrostatic iodized water nature. This type of binding can only occur if between the atoms concerned there is a marked difference in electronegativity. In pure covalent bond the atoms have similar electronegativity values tend to share electrons iodized water equally. The pure covalent bond is stronger than an ionic bond and does not give rise to any potential

difference around the molecule. It 'clear that imported are rare extreme cases: the real ties tend more or less pure covalent or ionic to pure. We can accurately classify each link according to the difference in electronegativity of the atoms: The electronegativity is the force with which an atom attracts electrons if another atom: the values for each atom can be found in the graph below values of Pauling electronegativity . Non-polar covalent bond: It has if the difference in electronegativity between the atoms Δ is <0.5 Example: molecular hydrogen H 2 calculate the potential difference H = 2.1 - 2.1 = H = 0. Δ is therefore <0.5 the covalent bond is non-polar in fact the charges on the hydrogen molecule are arranged evenly on the entire surface.

Polar covalent bond: It is if the difference in electronegativity 0.5 <Δ <2.0 Example: water H 2 O Compute Δ: electronegativity oxygen-elettroneg. hydrogen = 3.5-2.1 = 1.4 this value of Δ is between 0.5 and 2.0, the water is therefore polar covalent iodized water bond. Ionic bond: It is if Δ is> 2.0 Example: sodium chloride NaCl Δ = 3.0-0.9 = 2.1 2.1> 2.0, the bond is ionic.
The VSEPR model allows us to define iodized water the three-dimensional shape of a molecule from its Lewis structure. to draw ...
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