South Carolina Standards
SC.PS-2. Physical Science: Chemistry: Structure and Properties of Matter: The student will demonstrate an understanding of the structure and properties of atoms.
PS-2.1. Compare the subatomic particles (protons, neutrons, electrons) of an atom with regard to mass, location, and charge, and explain how these particles affect the properties of an atom (including identity, mass, volume, and reactivity).
PS-2.2. Illustrate the fact that the atoms of elements exist as stable or unstable isotopes.