Relative Atomic Mass

• What are masses relative to?

  They are relative to 1/12 of Carbon-12
• What is relative isotopic mass?


  THe mass of an atom compared with 1/12th the mass of carbon-12.
• Is there multiple relative isotopic masses for each isotope?


  No there is only one and it is always a full number as well.
• What is relative atomic mass?


  THe mean mass of an atom of an element compared with 1/12th of the mass of carbon-12.
• Why is the mean weighted?


  The mean is weighted for the abundance of each isotope.
• Can the relative atomic mass be a decimal?


  Yes as it is a mean.