This 23 slide power point presentation describes matter, the atom, the subatomic particles (the proton, neutron, and electron), atomic numbers, atomic mass, the elements, and isotopes. It is illustrated and animated to best show what an atom is and what it is made of on the 6th, 7th, and/or 8th grade level. Additionally, the power point includes a 21 slide review. This presentation could support a unit or chapter discussion of the atom as well as serve as a review for chemistry. This could be used in physical science, general science, biology, or chemistry.