Barium, on periodic table of elements. Alkaline earth metal, with symbol Ba, and atomic number 56. Barium sulfate is used as X-ray radiocontrast agent.

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Barium, on periodic table of the elements. Alkaline earth metal, with symbol Ba, and atomic number 56. Barium sulfate is used as X-ray radiocontrast agent for imaging the human gastrointestinal tract.

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Photo credit: © Peter Hermes Furian / Alamy / Afripics
License: Royalty Free
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