The Gram Atomic Mass of a substance is equal to the atomic mass of a substance taken in grams.

In other words, it is the mass of 1 mole of an element based on its atomic mass expressed in grams.


Example: Sodium (Na) has atomic weight 23u

It gram atomic mass is thus 23g


So 1 mole of Na atoms has a mass of 23 grams.

  1. Class 9
  2. Chapter 3 Class 9 - Atoms And Molecules (Term 2)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo