Nomenclature

• Chromium (III) fluoride


  $CrF_3$
• Dinitrogen monoxide


  $N_2 O$
• Carbon monoxide


  $CO$
• Nitrogen dioxide


  $NO_2$
• Calcium fluoride


  $CaF_2$
• Naming Ionic Compounds

  • Metal is the first name
  • Non-metal has the suffix -ide
  • In between is the charge of the metal (Roman numerals)
  • Note: Usually, we write the charge of transition metals since they are ambiguous. However, the charges on group 1 and 2 metals are clear and not always necessary
  • E.g. Calcium fluoride $\Leftrightarrow$ Calcium (II) fluoride $\Leftrightarrow$ $CaF_2$
• Naming Covalent Compounds

  • Name the non-metal furthest to the left on the periodic table
  • Name the other non-metal with -ide suffix
  • Prefixes: mono-, di-, tri-, tetra-, penta-, hexa-, hepta-, octo-, nova-, deca-
  • If mono- is the first prefix, it is understood and not written
  • E.g. Monocarbon monoxide $\Rightarrow$ Carbon monoxide $\Leftrightarrow$ $CO$