Sunday, 20 September 2015

Lead: Most Dangerous Chemical Elements (full documentary) – DOCFILMS

Lead is a chemical element in the carbon team with icon Pb in addition to atomic number 82. Lead is a soft, versatile and heavy post-transition metal. Metal lead has a bluish-white color after being fresh reduced, yet it swiftly stains to a dull grayish shade when based on air. Lead has a shiny chrome-silver [ ]

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