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.
a type of chemical bond involving the sharing of electrons between atoms in a molecule, esp the sharing of a pair of electrons by two adjacent atoms. covalent bond in Medicine Expand. covalent bond n. A chemical bond formed by the sharing of one or more electrons, especially pairs of electrons, between atoms. covalent bond. A chemical bond formed when electrons are shared between two atoms. Usually each atom contributes one electron to form a pair of electrons that are shared by both atoms. See more at coordinate bond, double bond, polar bond.