Gazul indispensabil vietii, O2, Cel mai comun solvent polar, H2O, Salpetru de India, KNO3, Compus binar brun al azotului/Gaz brun-roscat, NO2, Substanta majoritara din componenta aerului, N2, Substanta care se aprinde in aer, se pastreaza sub apa, P4, Apa de var/Var stins, Ca(OH)2, Cel mai abundent element din Univers, H2, Soda calcinata/Soda de rufe, Na2CO3, Metalul din componenta hemoglobinei, Fe, Spirt de sare/Acid gastric, HCl, Gaz de lupta, sufocant, galben-verzui, Cl2, Potasa caustica, KOH, Gaz cu miros de oua clocite, H2S, Pirita, FeS2, Inamicul cuprului, S, Metal cu actiune antibacteriana, Ag, Substanta cu proprietati magnetice, Fe, Clorura de var, CaOCl2, Oxid mixt/ Magnetit, Fe3O4, Perechea de substanta responsabila pentru formarea stalactictelor, Ca(HCO3)2/CaCO3, Gaz cu miros intepator, NH3, Perhidrol, H2O2, Subst. utilizata in medicina pentru vizualizarea tractului intestinal, BaSO4, Nemetal utilizat in vulcanizarea cauciucului, S, Apa regala, Amestec de HNO3 si HCl, Salpetru de Chile, NaNO3.

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