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Lead (pronounced "led") 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 ...
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.
Surprising Lead-Tainted Foods. Lead, a naturally occurring toxic element found in the earth’s soil, can have serious health consequences with even minimal exposure.
Lead (Pb) is a heavy trace element and is formed by the radioactive decay of uranium and thorium. In crustal rocks, it is present as the lead sulfide mineral galena . [ 1 ] Natural sources of lead in the lead cycle include wind borne dust, volcanic outgassing, and forest fires. [ 2 ]
A naturally occurring element, lead can end up in food, especially food sourced from other countries where there is less regulation. Lead can be used to make food products appear more appealing, ...
"Lead can be damaging to the developing brain," Calello says. "While adults can have effects from excess lead exposure as well, the effects are more severe in children and occur at lower levels."
White lead" is the key ingredient in (now discontinued) lead paints. Ingestion of lead-based paint chips is the most common cause of lead poisoning in children. [7] [8] [9] Both "white lead" and lead acetate have been used in cosmetics throughout history, though this practice has ceased in Western countries. [10]
Lead is a potent neurotoxin and can disrupt brain development in many ways that can impact most types of mental health problems, including anxiety, depression and ADHD, he said. But people were ...