How to determine atomic mass?

The atomic mass of the atom is the mass of the protons plus the mass of the neutrons, 6 + 7, or 13. 3) Weighted Average for All Atoms of an Element. The atomic mass of an element is a weighted average of all the element's isotopes based on their natural abundance. It is simple to calculate the atomic mass of an element with these steps. read more

How to Calculate Atomic Mass. Three Methods: Finding Atomic Mass Readings on the Periodic Table Calculating Atomic Mass for an Individual Atom Calculating Relative Atomic Mass (Atomic Weight) for an Element Community Q&A. Atomic mass is the sum of all the protons, neutrons, and electrons in a single atom or molecule. read more