article: Period (periodic table)
links: Synthetic Actinides Calcium Carbon group Hafnium Dysprosium Group 4 element Untrioctium Aluminium Group 12 element Unhextrium Untritrium Silicon Tellurium Coinage metal Titanium Cobalt Selenium Scandium Terbium Indium Sulfur Untrinilium Untrihexium Protactinium Radium Unhexoctium Krypton Tin Silver Caesium Europium Periodic table group Unbioctium Period 4 element Gadolinium Manganese Untriunium Nihonium Magnesium Unquadnilium Rubidium Roentgenium Cadmium Oganesson Untriennium Mercury (element) Elementary algebra Period 2 element Untriquadium Gallium Lutetium Poor metal Platinum Germanium Unbitrium Zinc Bohrium Unbiunium Chemical element Gold Iodine Bromine Carbon Osmium Sodium Copernicium Cerium Alkaline earth metal Group 9 element Unseptbium Period 7 element Beryllium Molybdenum Pnictogen Phosphorus Hassium Iridium Periodic table period Actinium Darmstadtium Unpentseptium Holmium Plutonium Praseodymium Uranium Unbiseptium Unbipentium Group 8 element Berkelium Chlorine Tennessine Francium Neodymium Period 8 element Thallium Oxygen Arsenic Lanthanide Moscovium Unhexseptium Ununennium Astatine Alkaline earth Lead Unpenthexium Metalloid Unhexpentium Bismuth Period 6 element Dubnium Iron Samarium Unquadquadium Meitnerium Nickel Period 1 element Nobelium Unbinilium Erbium Californium Group 5 element Mendelevium Neptunium Fluorine Promethium Thorium Zirconium Barium Group 10 element Neon Noble gas Copper Actinide Nitrogen Yttrium Tungsten Thulium Einsteinium Antimony Lithium Flerovium Technetium Boron Strontium Helium Untriseptium Boron group Fermium Rutherfordium Alkali metal Nonmetal Unquadunium Rhenium Group 6 element Niobium Polonium Curium Chromium Radioactivity Untribium Unseptquadium Unbibium Unhexquadium Hydrogen Potassium Livermorium Lawrencium Ytterbium Radon Transition metal Unhexhexium Seaborgium Xenon Unsepttrium Unquadbium Vanadium Group 7 element Americium Period 5 element Period 3 element Halogen Lanthanum Argon