covalent molecules

• what is the difference between liquid and aqueous

  aqueous is dissolved in water
• substances that consist of small molecules are usually...

  gases or liquids
• gases or liquids that have small covalent molecules have _________ melting and boiling points

  relatively low
• why?


  due to weak intermolecular forces between molecules. these substances are overcome when a substance boils or melts.
• in small covalent molecules, are intramolecular covalent bonds strong?

  yes. never say we are breaking the bonds.
• Do intermolecular forces increase or decrease as the size of the molecule increases

  increase
• larger molecules have higher or lower melting or boiling points??

  higher, but still relatively low compared to ionic componds
• give an example of a large covalent molecule

  oils are large covalent molecules. they have a high melting and boiling point so we use them often in cooking
• give an example of a large covalent molecule


  polymers are also covalent structures but are very long. numerous plastics are polymers. polyvinal chlorines is a polymer.
• what are some properties of polymers

  very large moleculesatoms in polymer are linked tootheratoms by small covalent bondsintermolecular forces between polymer molecules are relatively strong.polymers are solid at room temperature
• do covalent molecules conduct electricity

  no, because the substances do not have an overall electrical charge. there are no free electrons to carry the charge
• if covalent molecules cannot conduct electricity, why are people scared of dropping electricity in water

  because some impurities such as sweat and salts can sometimes be found in water