melting n boiling trends

•  Explanation of the trend in melting temperatures across the elements of Period 2 in terms of their structure and bonding:


  • At the start of the period the Li to Be bonding is metallic;
  • Metallic bonding gets stronger as the charge on the cation increases;
  • In the middle of the period B and C has a giant structure of atoms;
  • A lot of energy is needed to break strong covalent bonds, in graphite and diamond;
  • At the end of the period the N to Ne are simple molecules
  • And have weak London forces between their molecules;