Standards Covered: (NGSS) PS1.A as found in HS-PS1-1: Each atom has a charged substructure consisting of a nucleus, which is made of protons and neutrons, surrounded by electrons. PS1.C as found in HS-PS1-8: Nuclear processes, including fusion, fission, and radioactive decays of unstable nuclei, involve release or absorption of energy Resources: below is a list of the resources in this unit with a brief description and a suggested order in which to use them. 1. Build an Atom PhET: Students disc