Small Molecules

• Properties of small molecules

  Substances that consist of small molecules are usually gases or liquids that have relatively low melting and boiling points
• Small molecules

  Have weak forces between the molecules (weak intermolecular forces)
• Intermolecular forces

  Intermolecular forces are what are overcome when a substance melts or boils
• Intermolecular forces

  They increase with the size of the molecules, so larger molecules have higher melting and boiling points