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Lead (/ l ɛ d /) is a chemical element; it has symbol Pb (from Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to ...
Lead occurs naturally, though how it ends up in the food supply is complicated. ... Lead has been used to make food products look more appealing, but nearby industrial activity can also taint ...
Lead is commonly incorporated into herbal remedies such as Indian Ayurvedic preparations and remedies of Chinese origin. [25] [30] There are also risks of elevated blood lead levels caused by folk remedies like azarcon and greta, powders containing lead tetroxide and lead oxide, respectively, which each contain about 95% lead. [30] [147]
4. Spices. Spices like turmeric, paprika, and chili powder can contain lead, sometimes at alarming levels. A lot of this contamination comes from poor farming practices, where spices are grown in ...
Cut glass wine glass made of lead glass. Lead glass, commonly called crystal, is a variety of glass in which lead replaces the calcium content of a typical potash glass. [1] Lead glass contains typically 18–40% (by mass) lead(II) oxide (PbO), while modern lead crystal, historically also known as flint glass due to the original silica source, contains a minimum of 24% PbO. [2]
Lead poisoning in children is usually caused by swallowing or breathing in dust form lead-based paint, but lead can also be found in the soil and air from car, plane and factory emissions, and ...
Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. [5] Galena is one of the most abundant and widely distributed sulfide minerals. It crystallizes in the cubic crystal system often showing octahedral forms.
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