Period 3 element density and for its ability to resist corrosion due to the phenomenon of passivation. Structural components made from aluminium and its alloys are vital to the aerospace industry and are important in other areas of transportation and structural materials. The most useful compounds of aluminium, at least on a weight basis, are the oxides and sulfates. "Silicon" (symbol Si) is a tetravalent metalloid. It is less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table, but more reactive than germanium, the metalloid directly below it in the table. Controversy about silicon's character dates to
Inorganic compounds by element Inorganic compounds by element This is a list of common inorganic and organometallic compounds of each element. Compounds are listed alphabetically by their chemical element name rather than by symbol, as in list of inorganic compounds. AcCl, AcF, AcO AlH, AlBr, AlBr, AlCl, AlCl(OH), AlF, AlGaAs, AlGaN, Al(OH), AlI, AlI, Al("i"-PrO), Al(NO), AlN, AlO, Al(SO), AlS, "i"-BuAlH (DIBAL-H), EtAlCl, LiAlH, (−Al(CH)O−), EtAl, MeAl AmCl, AmCl, AmF, AmO SbF, SbF, SbCl, SbCl, SbO, SbO, SbS, SbS, InSb, CHKOSb, KSbF, NaSbF, SbH, (CH)Sb HArF AsBr, AsCl, AsF, AsF, AsO, AsO, AsS, AsH, (CH)AsOOH, GaAs, KAsF, KHAsO, NaAsO, NaHAsO, NaAsO, (CH)As, (CH)As LiAt,