This activity is meant to be a supplement to the "Earth Science" textbook published by McDougal Littell (now Holt McDougal), but no textbook is required to use it!
Using this simulator, you can drag'n'drop protons, neutrons, and electrons to create the first 10 elements in the periodic table, as well as most of their isotopes! (Macromedia Shockwave Player required for this website).
Build Atoms Yourself
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