actinium actinoid alkali metal alkaline earth metal aluminium americium anhydrous antimony argon arsenic astatine atom atomic clock atomic mass atomic number atomic radius aulus gellius azide barium berkelium beryllium biosphere bismuth bohrium boiling point boron bromine bulk modulus cas registry number cadmium caesium chloride caesium fluoride caesium hydroxide calcium californium cancer carbon celsius cerium chemical element chemical elements data references chlorine chromium cobalt coefficient of thermal expansion collective names of groups of like elements color copper covalent radius crystal structure curium cyanide darmstadtium decay energy decay product density digital object identifier dirty bomb drilling fluid dubnium dysprosium einsteinium electrolysis electron electron configuration electron shell electronegativity emission spectrum energy level enthalpy of fusion erbium europium fahrenheit fermium fluoride fluorine francium gadolinium gallium germanium germany getter glass gold gustav kirchhoff hafnium half-life halogen hassium helium holmium hydrate hydrogen hydrogenation hydrology hyperfine structure indium infrared international system of units iodine ionization potential iridium iron isotope isotopes of caesium kelvin krypton lanthanoid lanthanum latin lawrencium lead lepidolite list of elements by atomic number list of elements by name list of elements by symbol lithium lutetium magnesium manganese manitoba meitnerium melting point mendelevium metal metalloid mineral water mohs scale of mineral hardness molybdenum natural abundance neodymium neon neptunium neutron nickel nigidius figulus niobium nitrate nitrogen nobelium noble gas nonmetal north american english nuclear power nuclear testing nuclear weapon organic chemistry organic compound osmium oxford english dictionary oxidation state oxidizing agent oxygen palladium periodic table periodic table block phosphorus picometre platinum plutonium pollucite polonium potassium praseodymium promethium protactinium radioactive decay radiogenic radium radon rhenium rhodium robert bunsen roentgenium room temperature rubidium ruthenium rutherfordium s-block samarium scandium seaborgium second selenium silicate silicon silver sodium sodium amide solid specific gravity specific heat capacity spectrophotometry spectroscopy spectrum analysis stable isotope strontium sulfur synthetic radioisotope tantalum technetium tellurium terbium thallium thermal conductivity thorium thulium time tin titanium tonne trace radioisotope transition metal tungsten unbinilium ununbium ununennium ununhexium ununoctium ununpentium ununquadium ununseptium ununtrium uranium vacuum tube vanadium vapor pressure water wikimedia commons wikisource wiktionary xenon ytterbium yttrium zinc zirconium