What is the difference between atomic mass and atomic mass unit?
The atomic mass is the average weight of all the different isotopes of that particular element and the atomic mass unit is a measurement of weight. Or instance Oxygen might weight 16.0004 amu (atomic mass unit) normally but have an isotope that wights 16.1 amu and then the average of those two time there concentration is the atomic mass. You can find atomic mass like this: (#amu X percent of total amount in the sample you have expressed like (80%=.8000)+(isotopes#amu X percent of total amount in the sample).
