آخرین محصولات
Lead Definition & Meaning | Dictionary
to go through or pass (time, life, etc.): to lead a full life. Cards. to begin a round, game, etc., with (a card or suit specified). to aim and fire a firearm or cannon ahead of (a moving …
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Lead Definition & Meaning
a. : to guide on a way especially by going in advance. led the officers to his hiding place. b. : to direct on a course or in a direction. a road leading the traveler to the heart of the city. …
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Lead | Definition, Uses, Properties, & Facts | Britannica
Lead, a soft, silvery white or grayish metal in Group 14 (IVa) of the periodic table. Lead is very malleable, ductile, and dense and is a poor conductor of electricity. Known in antiquity and believed by the alchemists to be the oldest of metals, lead is highly durable and resistant to corrosion.
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CDC
Lead is a soft, dense, blue-gray metal. Lead occurs naturally in the earth's crust, where it combines with other elements such as oxygen and sulfur. It is used to make batteries and metal mixtures.
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Lead poisoning
Lead poisoning occurs when lead builds up in the body, often over months or years. Even small amounts of lead can cause serious health problems. Children younger than 6 years are especially vulnerable to lead poisoning, which can severely affect mental and physical development.
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Lead poisoning
Lead is a naturally occurring toxic metal found in the Earth's crust. Its widespread use has resulted in extensive environmental contamination, human exposure and significant public health problems in many parts of the world.
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Lead
Lead poisoning is a serious problem affecting children globally, according to a study published by the United Nations Children's Fund (UNICEF) in 2020. The study is the first to describe the magnitude of global lead poisoning. Up to 800 million children have blood lead levels at or above 5 micrograms per µg/dL.
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Lead
Lead is a chemical element with the symbol Pb (from the 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.
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Learn about Lead | US EPA
Lead is a naturally occurring element found in small amounts in the earth's crust. While it has some beneficial uses, it can be toxic to humans and animals, causing health effects. Where is Lead Found? Lead can be found in all parts of our environment – the air, the soil, the water, and even inside our homes.
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LEAD | English meaning
lead verb (DIRECTION) B2 [ I or T, usually + adv/prep ] ( especially of roads, paths, doors, signs, information, etc.) to go in a particular direction or have a particular result, or to …
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