Exclusionary zoning is the utilization of zoning ordinances to exclude certain types of people from a given community. This mechanism began gaining prominence in land-use regulations throughout the United States in the late 19th century.iven the increased utilization of exclusionary zoning, the United States federal government finally addressed the issue with the enactment of the Standard State Zoning Enabling Act of 1922. This legislation established the institutional framework for zoning ordinances.
Covalent bonds form when two atoms have a very small (nearly insignificant) difference in electronegativity. The value of difference in electronegativity between two atoms in a covalent bond is less than 1.7. Covalent bonds often form between similar atoms, nonmetal to nonmetal or metal to metal. Covalent bonding signals a complete sharing of electrons.
Share. Covalent Bond Definition: A covalent bond is a chemical link between two atoms in which electrons are shared between them. Examples: There is a covalent bond between the oxygen and each hydrogen in a water molecule (H 2 O).Each of the covalent bonds contains two electrons-one from a hydrogen atom and one from the oxygen atom. Both atoms share the electrons.Return to the Chemistry Glossary Index.xamples: There is a covalent bond between the oxygen and each hydrogen in a water molecule (H 2 O). Each of the covalent bonds contains two electrons-one from a hydrogen atom and one from the oxygen atom.