Molecular substances: Bonding structure and the properties of matter: Chemistry: (9:1)

• Molecule


  Two or more atoms held together by covalent bonds
• Polymer


  A long molecule consisting of many similar or identical monomers linked together.
• State of molecular substances at room temperature

  Liquids or gases
• intermolecular forces


  Forces of attraction between molecules
• Melting and boiling points of molecular substances

  Low
• Reason for melting and boiling points of molecular substances

  Intermolecular forces are weak.
• Trends in intermolecular forces

  the larger the molecule the stronger the intermolecular forces.
• Electrical conductivity of molecular substances

  Low conductivity
• Reason for electrical conductivity of molecular substances

  Molecules are neutral
• Covalent bonds


  A shared pair of electrons
• Intermolecular forces in polymers

  Stronger than for smaller molecules
• State of polymers are room temperature

  Solids