Small amounts of iodine can be made through the reaction of solid sodium iodide NaI with concentrated sulphuric acid H2SO4 The first stage is formation of HI which is a gas but under the reaction conditions some of the HI is oxidized by further H2SO4 to form iodine and sulphur dioxide NaI s H2SO4 l HI g NaHSO4 s 2HI g H2SO4 l I2 g SO2 g 2H2O l Buy Atommate card game Pick element Switch to actinium aluminium aluminum americium antimony argon arsenic astatine barium berkelium beryllium bismuth bohrium boron bromine cadmium caesium calcium californium carbon cerium cesium chlorine chromium cobalt copper curium darmstadtium dubnium dysprosium einsteinium erbium europium fermium fluorine francium gadolinium gallium germanium gold hafnium hassium helium holmium hydrogen indium iodine iridium iron krypton lanthanum lawrencium lead lithium lutetium magnesium manganese meitnerium mendelevium mercury molybdenum neodymium neon neptunium nickel niobium nitrogen nobelium osmium oxygen palladium phosphorus platinum plutonium polonium potassium praseodymium promethium protactinium radium radon rhenium rhodium roentgenium rubidium ruthenium rutherfordium samarium scandium seaborgium selenium silicon silver sodium strontium sulfur sulphur tantalum technetium tellurium terbium thallium thorium thulium tin titanium tungsten ununbium ununhexium ununquadium uranium vanadium xenon ytterbium yttrium zinc zirconium Go adjacent Se Br Kr Te I Xe Po At Rn compounds Select formula from below Fluorides IF IF3 IF5 IF7 Chlorides ICl ICl3 2 Bromides IBr Iodides none listed Hydrides none listed