non-polar covalent bond is a direct bond.It is formed by the common electron pairs.There are 2 types of covalent associations are different formation mechanism.Consider her education and learn more about what is mostly of a non-polar bond.It is often formed in simple substances - nonmetals, however, can occur in the compounds formed by different atoms, with the proviso that the electronegativity value of the elementary particles are equal.For example, the substance PH3, EA (R) = EA (H) = 2.2.
consider as non-polar covalent bond is formed.In the hydrogen atom only one electron, so its electron shell is not complete, it lacks even 1. The interaction of atoms of Hydrogen begin to converge by the forces of attraction of nuclei and electrons, thus partially blocking the electron clouds.In this form a doublet, which belongs to two elementary particles.In a place where the electron clouds have blocked each other, there is an increased electron density, attracts the nuclei of atoms, thereby providing them with a strong bond in the molecule.Nonpolar covalent bond schematically written as follows:
· H · H + - H : H or N - N.
where unpaired electron outer level is indicated by one point, and the total electron pair of two points - : or dash.
From the foregoing, it is clear that the area of overlap of the electron clouds located symmetrically with respect to the two atoms.In a similar way to non-polar covalent bond is formed when a molecule of simple substances having more electrons.
Since this relationship is typical for most non-metals, it is possible to establish a pattern related to their physical properties.Substances with apolar covalent association may be solid (silicon, sulfur), gases (hydrogen and oxygen) and liquid (only bromo).If you look closely at the molecular weights of gaseous and liquid non-metal, you can see that with an increase in Mr often increases the melting point and boiling point.With solid non-metals this does not happen.The fact is that such simple materials have atomic-crystalline structure, which gives the strength of the non-polar covalent bond.Thus, the increase in quantity of such a connection, the harder the compound, for example, diamond and graphite.
non-polar Association is of great importance in the life processes of organisms asit is much stronger and more stable, and hydrogen ion.In order to break such links, animals or plants need to expend a lot of energy, so the mechanism of destruction are actively involved enzymes.
nonpolar covalent bond - a bond formed by the same atoms or elementary particles of different complex compound having the same values of electronegativity.Thus equally atoms sharing a common electron pair (doublet).
