Tip:
Highlight text to annotate it
X
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon
Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron
Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium
Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony
Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium
Europium Gadolinium Terbium Dysprosium Holmium *Erbium* Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten
Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium
Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium
*Mendelevium* Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium
Darmstadtium Roentgenium Copernicium Flerovium Livermorium
You messed two elements, Doug. Remember Erbium and Mendelevium next time!