How are atomic mass and mass number different? Chemistry Matter Atomic Mass 1 Answer Shreyans Bhansali Jan 11, 2014 Here's an excellent lesson by Tyler DeWitt: What's the Difference between Mass Number and Atomic Mass? Answer link Related questions How do you calculate the atomic mass of carbon? How do you calculate atomic mass from isotopic composition ? How do atomic mass and atomic weight differ? How do atomic masses reflect isotope abundances? How do atomic masses vary throughout the periodic table? How much atomic mass is in hydrogen? What atomic mass does ekasilicon have? Why are atomic masses of most of the elements fractional? What is atomic mass? How do you calculate the atomic mass of carbon? See all questions in Atomic Mass Impact of this question 14967 views around the world You can reuse this answer Creative Commons License