Example image of eyePlorer eyePlorer map for 'Valence electron': Atom Electron Electron configuration Inert gas Open shell Ion Covalent bond Photon Group (periodic table) Transition metal D electron count Helium Main group element Principal quantum number Noble gas Manganese Argon Oxidation state Permanganate Nickel Zinc Chemical bond Periodic table Octet rule Alkali metal Metal Potassium Reactivity (chemistry) Sodium Ionic bond Ionization energy Alkaline earth metal Magnesium Nonmetal Chlorine Fluorine Halogen Valence (chemistry) Electrical conductivity Metalloid Semiconductor Solid Periodic table (metals and non-metals) Electric current Electric field Aluminium Copper Gold Silver Insulator (electrical)