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Barium is a chemical element; it has symbol Ba and atomic number 56. centimillimental kizuato lyrics It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. data pengeluaran hk 6 Because of its high chemical reactivity, barium is never found in nature as a free element The most common minerals of barium are baryte ( barium sulfate, BaSO 4) and witherite ( barium carbonate