BARIUM
Barium is a chemical element with symbol Ba and atomic number 56.Barium is a soft, silvery white metal, with a slight golden shade when ultra pure. Barium is chemically similar to magnesium, calcium, and strontium, being even more reactive. Barium is used in testing procedures. Patients swallow barium and an x-ray is done of their digestive system. It is used as a radiocontrast agent in X-ray imaging of the digestive system.
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