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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 ...
Tarnished lead (left) and shiny lead (right) Compounds of lead exist with lead in two main oxidation states: +2 and +4. The former is more common. Inorganic lead(IV) compounds are typically strong oxidants or exist only in highly acidic solutions. [1] Red α-PbO and yellow β-PbO The mixed valence oxide Pb 3 O 4 Black PbO 2 which is a strong ...
Some of the main alloying elements are optionally listed after the alloy names. Alloys by base metal ... (lead, tin, cadmium) Rose metal (lead, tin) Wood's metal ...
Lead, a naturally occurring toxic element found in the earth’s soil, can have serious health consequences with even minimal exposure. ... For example, lead chromate, a bright yellow pigment, is ...
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.
Lead(II) azide – Pb(N 3) 2; Lead(II) bromide – PbBr 2; Lead(II) carbonate – Pb(CO 3) Lead(II) chloride – PbCl 2; Lead(II) fluoride – PbF 2; Lead(II) hydroxide – Pb(OH) 2; Lead(II) iodide – PbI 2; Lead(II) nitrate – Pb(NO 3) 2; Lead(II) oxide – PbO; Lead(II) phosphate – Pb 3 (PO 4) 2; Lead(II) sulfate – Pb(SO 4) Lead(II ...
A lead compound (/ ˈ l iː d /, i.e. a "leading" compound, not to be confused with various compounds of the metallic element lead) in drug discovery is a chemical compound that has pharmacological or biological activity likely to be therapeutically useful, but may nevertheless have suboptimal structure that requires modification to fit better to the target; lead drugs offer the prospect of ...
Lead compounds are those chemical compounds which contain lead. For lead compounds in the context of pharmacology and drug discovery, see lead compound. Subcategories.