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Why we call heavy metals heavy?? reason? |
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Answer» ong>Answer: The term heavy metal refers to any metallic chemical ELEMENT that has a relatively high density and is toxic or poisonous at low concentrations. EXAMPLES of heavy METALS include mercury (Hg), CADMIUM (Cd), arsenic (As), chromium (Cr), thallium (Tl), and lead (Pb). |
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