Build An Atom

Build An Atom is an interactive simulation that lets you assemble atoms from the ground up. Drag and drop protons, neutrons, and electrons to create stable or unstable atomic structures. See real-time visual feedback on atomic mass, charge, and element identity. Test your understanding by predicting an atom's properties before you build it. The software provides a safe, virtual lab to explore the fundamental building blocks of matter, making abstract atomic theory tangible and engaging for learners of all levels.