Atomic mass

The video tutorial explains the concept of isotopes and their significance in chemistry. It covers the definition of atomic mass, expressed in atomic mass units, and its relation to the mass of a proton. The tutorial further details the components of atomic mass, including protons, neutrons, and electrons, and discusses how the number of neutrons can vary between isotopes, affecting their atomic mass.

Why can atomic mass vary from one isotope to another?

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How does the number of neutrons affect the atomic mass of an element?

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