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The 2,400-year search for the atom - Theresa Doud

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using a PhET simulation.

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Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!

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from CK-12

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Atom Builder Challenge (Atomic Number, Mass Number, Proton, Electron, Neutron, Modern Periodic Table) | Chemistry | CK-12 Exploration Series

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Learn what makes each element unique by building the mystery atoms in the periodic table.

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A fun and helpful interactive

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Scale of the Universe: Discover the vast ranges of our visible and invisible world.

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Scale of Universe is an interactive experience to inspire people to learn about the vast ranges of the visible and invisible world.

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good for reviewing average atomic mass

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Thomson's and Rutherford's models explained by CK-12

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Slide show from class

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Atomos History of Atomic Models Slideshow

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How and why ideas change

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See the Crash Course version of the story...

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The History of Atomic Chemistry: Crash Course Chemistry #37

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And what's the proper notation for an isotope?

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And what's the proper notation for an isotope?

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A summary slide show...

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by Mr. Anderson

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Nuclear Reactions and radioactivity explained

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Nuclear Reactions and radioactivity explained

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Professor Dave knows

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Nuclear Reactions, Radioactivity, Fission and Fusion

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How scientists figured out what matter is made of

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Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.

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Ted Ed blows your mind!

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It's interactive and dynamic!

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Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

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and Scientific Notation...

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A mini-lesson on every element

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TED-Ed celebrates the ideas of teachers and students around the world. Discover hundreds of animated lessons, create customized lessons, and share your big ideas.