This set consists of 10 atoms showing electrons, protons, and neutrons. These models are excellent teaching aids for helping students visualize the structure of atoms and their respective components. The set includes: hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon. Isotopes for the models of hydrogen, helium, and lithium can be made with a magnetically attached neutron. Optional stand is also available.