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This chemistry video tutorial explains how to find the percent abundance of an isotope. It uses bromine-79 and bromine-81 as an example.

Chemistry - Basic Introduction:

Significant Figures Review:


Unit Conversion Problems:


Pure Substances & Mixtures:


Physical and Chemical Changes:


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Atoms - Basic Introduction:


Cations and Anions Explained:


Diatomic Elements & Molecules:


Elements, Atoms, & Molecules:


Protons, Neutrons, & Electrons:


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Average Atomic Mass:


What Are Isotopes?


Percent Abundance of Isotopes:


Ionic and Covalent Bonding:


Naming Molecular Compounds:


Writing Formulas - Ionic Compounds:


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Final Exams and Video Playlists:


Full-Length Videos and Worksheets:


Protons & Neutrons - Formula Sheet:

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