Formulas

• Functional group is an atom or group of atoms which causes molecules to have similar properties
• Homologous Series is a family of molecules with the same functional group and The same general formula but increasing number of CH2 atoms
• Displayed Formula - Shows all bonds present in the molecule

  C2H2
• Skeletal formula - carbon to hydrogen bonds represented by straight lines, carbon atoms are where bonds meet (H bonds not drawn)

  
  

  2-Bromo 2-Methylbutane

  
• Molecular Formula - The actual number of atoms of each element in one molecule of a compound

  Ethane: C2H6

  
• Empirical Formula - The Simplest whole number ratio of atoms of each element present in a compound