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Handout
NASA

Nasa: The Sun's Energy Source

For Students 9th - 10th
This site, which is provided by NASA, gives some scientific history and a clear and detailed explanation of nulcear forces and nuclear fusion.
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Handout
Lawrence Berkeley National Laboratory

Berkeley Lab: Unstable Nuclei

For Students 9th - 10th
A brief examination of the Chart of the Nuclides and unstable nuclei.