Link to the newer HTML5 version of this PhET simulation
This is a lesson plan appropriate for Grades 7-10, created specifically to accompany the "Isotopes and Atomic Mass" simulation. It is very effective at guiding beginning students through an exploration of the atomic nucleus and factors that affect the stability of an atom.
A link to the PhET simulation "Nuclear Fission", which would be beneficial as a companion resource to "Isotopes and Atomic Mass".
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