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If barium is so poisonous then why are we able to swallow barium meal when taking an X-ray of our stomachs?
[quote="meawinner"]If barium is so poisonous then why are we able to swallow barium meal when taking an X-ray of our stomachs?[/quote]
Because when you swallow a "barium meal" when getting an X-Ray of your stomach, the barium is in the form of it's sulfate salt. (BaSO4) Barium Sulfate is completely insoluble and will not disassociate into the Ba+2 and (SO4)-2 ions. If it can't dissolve in water, it's unable to get into your blood stream and internal organs and cause damage.
There is also radiation damage which is minor .
WebElements: the periodic table on the WWW [http://www.webelements.com/]