what is heavy metals give an example
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Examples of heavy metals include mercury (Hg), cadmium (Cd), arsenic (As), chromium (Cr), thallium (Tl), and lead (Pb). Heavy metals are natural components of the Earth's crust. They cannot be degraded or destroyed.
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Answer:
Heavy metal :
Heavy metal are defined as metals with the relatively high densities and is toxic or poisonous at low concentration.
example of heavy metal :
mercury (hg) , cadmium (cd) , chromium (cr) .
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