Introduction to chemistry | Atoms, compounds, and ions | Chemistry | Khan Academy
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Introduction to chemistry | Atoms, compounds, and ions | Chemistry | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/chemistry/atomic-structure-and-properties/introduction-to-the-atom/v/introduction-to-chemistry A big picture view of chemistry and why it is fascinating. How chemistry relates to math and other sciences. View more ...
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