Bonding and Properties Review

Overview

This lecture reviews the properties and bonding types of various compounds, focusing on ionic and covalent bonds, and the conductivity associated with these bonds.

Ionic Compounds

• Conductivity
  • Ionic compounds conduct electricity when they are liquid or dissolved in water.
  • Conductivity occurs because charged ions are present to move and carry current.
  • The lattice structure in solid state is broken when dissolved, freeing ions.

Covalent Compounds

• Non-conductivity
  • Covalent compounds do not conduct electricity well.
  • Atoms in covalent bonds are held together by strong forces.
  • Lack of ions means no charge carriers are present.

Metals and Ionic Bonds

• Non-formation of Ionic Bonds
  • Metals do not form ionic bonds with each other.
  • This is because metals have an electronegativity difference (EN) less than 1.7.

Additional Notes

• Review pages referenced in the lecture: p.78-83 for additional details on bonding and properties.