actinides in the environment actinium actinoid albert ghiorso alkali metal alkaline earth metal aluminium americas antimony argon argonne national laboratory arsenic astatine atomic mass unit atomic number atomic radius atomic weight barium berkelium beryllium beta decay bismuth bohrium boiling point boron bromine cas registry number cadmium caesium calcium californium carbon celsius cerium chemical elements data references chlorine chromium cobalt collective names of groups of like elements color copper crystal structure curium darmstadtium decay energy decay product density digital object identifier dubnium dysprosium einsteinium electron electron configuration electron shell electronegativity enthalpy of fusion erbium europium f-block fahrenheit fermium fissile fluorine francium gadolinium gallium gamma ray germanium glass gold gram hafnium half-life halogen hassium helium holmium hydrogen indium iodine ionizing radiation iridium iron isomeric transition isotope isotopes of americium kelvin kilogram krypton lanthanoid lanthanum lawrencium lead liquid-liquid extraction list of elements by atomic number list of elements by name list of elements by symbol lithium lutetium magnesium manganese meitnerium melting point mendelevium metal metalloid microgram molybdenum natural abundance neodymium neon neptunium neutron neutron capture nickel niobium nitrogen nobelium noble gas nonmetal nuclear fuel nuclear isomer osmium oxidation state oxygen palladium periodic table periodic table block phosphorus picometre platinum plutonium polonium potassium praseodymium promethium protactinium radioactive decay radiography radium radon rhenium rhodium roentgenium room temperature rubidium ruthenium rutherfordium samarium scandium seaborgium selenium silicon silver smoke detector sodium solid specific heat capacity spent nuclear fuel spontaneous fission strontium sulfur synthetic element synthetic radioisotope tantalum technetium tellurium terbium thallium thermal conductivity thorium thulium tin titanium transition metal tungsten unbinilium university of chicago ununbium ununennium ununhexium ununoctium ununpentium ununquadium ununseptium ununtrium uranium vanadium vapor pressure wikimedia commons wiktionary xenon year ytterbium yttrium zinc zirconium