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Hydrogen is the most common element in the universe. It was one of many elements visible in the Alliance of Four Great Races database. (SG1: "The Torment of Tantalus")

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Elements
AdariteAlkalineAmmoniaArgonAtomBariumBerylliumBoronCadoliinCalcium carbonateCarbonCarbon dioxideCarbon monoxideCarocevCharcoalChlorineCoalCyanideDeuteriumDiamondDieselFodinaireGasGasolineGoldGraniteGypsumHalon gasHeavy waterHU-2340Hydrochloric acidHydrogenIodineIridiumIronKevlarLeadLimeLiquid hydrogenLiquid NaquadahLiquid nitrogenMarbleMethaneNaquadahNaquadriaNethemiaNeutroniumNezanatNickelNitrogenNovus CO2 scrubber substanceOlesian oreOxygenPalladium hydridePapyrusPlutoniumPotassiumPotassium nitrateSaltSiliconSilverSteelSulfurSulfur dioxideSulfur dioxide microbeTetrachloroethyleneTitaniumTriniumUraniumWaterWoodXenon
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