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Back to category: Science Limited version - please login or register to view the entire paper. Barium Barium Barium is the 56th element in the modern periodic table. . Its symbol is Ba and it is located in group 2 in the periodic table. Barium is one of the alkaline earth metals. Its name comes from the Greek word barys witch means heavy or dense. Barium is a silver- white, highly reactive, metallic element. It has an atomic mass of 137.33 amu. The element’s melting point is 850 ºC and the boiling point is 1537 ºC. It has a specific gravity of 3.5 at 20ºC . Barium has a density of 3.51 g/cm³. The element’s hardness is comparable to that of the lead. It is the only alkaline earth metal that has a body-centered cubic crystal structure. It has a valence 2+ and has 6 energy levels. Barium is the 14th most common element and makes up 1/2000th of the crust of Earth. Barium was discovered in 1808 in England by Sir Humphrey Davy. Barium is never found in nature in an element form. It reacts with almost all the nonmetals. I... Posted by: Rainey Day Limited version - please login or register to view the entire paper. |
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