Iridium Hydrogen Helium Lithium Beryllium Boron Carbon nitrogen oxygen Fluorine neon Magnesium Aluminium Phosphorus Sulfur Argon Potassium Calcium Vanadium Manganese iron Cobalt Copper Zinc Gallium Germanium Arsenic Selenium Krypton rubidium Strontium zirconium Technitium Ruthenium silver Cadmium Tin antimony Tellurium Iodine Barium Lanthanum Hafnium Tantalum Tungsten Osmium Iridium Platinum Gold Mercury thallium lead Bismuth polonium astatine Radon Francium Radium Cerium Didymium Didymium Europium Erbium Protactinium Uranium Americium Californium