Relative Atomic Mass

Relative Atomic Mass

1. Introduction

   • Every element has its own unique relative atomic mass
   • RAM is based on the standard of carbon-12
   • One carbon-12 atom = 12u
   • The RAM is the average of all the isotopic atoms

2. Calculations

   • You need to know the percentages of each isotope of the element
   • Find the percentage of the mass number of each isotope, then add them together
   • E.g Br-79 = 50% Br-81=50% So (79*0.5)+(81*0.5)= 80