What is Harmful element?
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Answer:Some elements, such as mercury (Hg), cadmium (Cd), arsenic (As) and chromium (Cr), are toxic or carcinogenic even at low concentrations. Poisoning by exposure to PHEs is well known to affect central nervous system functions, damage blood composition, lungs, kidneys, liver and other vital organs.
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their are many harmful element like nepthnium uranium curiam Americium etc . pu is most dangerous and harmful it helps in making atomic bomb.............
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