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 Covalent (or molecular) bond is a bond between two non-metallic elements. This means that they share electrons inside the molecules. OR A type of chemical bond in which there is mutual sharing of electrons between two atoms is called covalent bond. covalent bond is a bond between two non-metallic elements. This means that they share electrons inside the molecules. OR A type of chemical bond in which there is mutual sha â¦ ring of electrons between two atoms is called covalent bond.