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.
â¢ covalent bond: a bond formed when atoms share one or more pairs of electrons. â Compounds that are networks of bonded atoms, such as silicon dioxide, are al so covalently bonded. â Covalent bonds usually form between nonmetal atoms. Covalent Bonds, continued â¢ Covalent compounds can be solids, liquids, or gases.â In a chlorine molecule, Cl 2, the atoms share two electrons.â They are joined by one covalent bond. Covalent Bonds, continued â¢ Atoms may share more than one pair of electrons.