Atomic Masses and Composition of Nucleus

The video tutorial explains how physicists measure atomic mass using atomic mass units (u), defined as 1/12 of a carbon-12 atom's mass. It discusses isotopes, which are atoms with the same chemical properties but different masses, using chlorine and hydrogen as examples. The video also covers the discovery of neutrons by James Chadwick, highlighting their role in atomic nuclei alongside protons. It explains atomic structure, including protons, electrons, and neutrons, and introduces concepts like atomic number, mass number, isotopes, isobars, and isotones.

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