Matching Pairs Chemical Elements Matching GameOnline version Match chemical elements with their properties and uses in this fun educational game! by Scout Achievement Day Games 1 Chlorine 2 Hydrogen 3 Oxygen 4 Gold 5 Iron 6 Helium 7 Sodium 8 Carbon Essential for respiration Reactive alkali metal Noble gas, lighter than air Lightest element Precious metal, non-reactive Common metal in construction Basis of organic life Used in water purification 1 Sodium 2 Helium 3 Hydrogen 4 Gold 5 Iron 6 Carbon 7 Oxygen 8 Chlorine Precious metal, Au Essential for respiration Used in disinfectants Second lightest element Foundation of organic life Key component of hemoglobin Lightest element Reactive alkali metal 1 Ok No