Answers to life's questions, Why are Whale Sharks an Endangered Species, How Many Countries Make up the Commonwealth. Lead is known from prehistoric times. The oldest artifact that contains lead is dated at 3800 BC. Because of this general chemical resistance, considerable amounts of lead are used in roofing, as coverings for electric cables placed in the ground or underwater, and as linings for water pipes and conduits and structures for the transportation and processing of corrosive substances. Because it is so dense, lead is used to add weight to fishing nets, diving gear and anchors. Who Discovered Watermelon? Save 50% off a Britannica Premium subscription and gain access to exclusive content. Lead was also discovered independently by the Egyptians, Babylonians, Assyrians and Chinese. In 1916 he went to work for Kettering, first in the research staff of the Dayton Engineering Laboratories Company (Delco) and then for the Dayton Metals Products Company, and he stayed with the latter company after it became a research arm of the General Motors Corporation in 1919. The symbol Pb for lead is an abbreviation of the Latin word for lead, plumbum. The Romans used it for tablets, water pipes, coins, and even cooking utensils; indeed, as a result of the last use, lead poisoning was recognized in the time of Augustus Caesar. Want to Know it? Lead is used in PVC pipes which coat electrical wires. This led to the problem of finding an economical source of bromine, and here Midgley is credited with developing a method for extracting the element from seawater. Who Discovered Barium. How much does does a 100 dollar roblox gift card get you in robhx? They have always been composed of graphite. Significant deposits are found in the United States in the western states and the Mississippi valley. We do not know who discovered it.Its ores are widely distributed and it has a low melting point so it is easily smelted.It was used in antiquity to make statues, coins, utensils and writing tablets. Metallic lead beads dating back to 6400 B.C. Copyright © 2017. Because lead is poisonous, miners would die from constant exposure after only a few years. Who Discovered the Constellation Pisces? Black Friday Sale! Lead is a major part of the lead-acid battery used in cars. Inter state form of sales tax income tax? True to its evil reputation in ancient times, lead makes a good bullet. For his chemical discoveries he received many honours, including four medals from the American Chemical Society and election to the National Academy of Sciences. Thomas Midgley Jr. was an American mechanical and chemical engineer. Lead has been known to many different civilizations throughout history. Naturally freemen didn’t want to handle raw lead. The Romans used lead for baths and plumbing. Who is the longest reigning WWE Champion of all time? In 1940 he was struck by polio. I needed this info for a science project. Updates? Born in Mitchellville, Iowa, Patterson graduated from Grinnell College. A compound of lead is used as an anti-knock additive in aviation fuel. Lead has been known since ancient times. When was the element Lead discovered? Required fields are marked *, You can use these HTML tags and attributes

. In which place the raw silk factories in tajikistan? He also found that dichlorodifluoromethane (a type of fluorocarbon commercialized under the trade name … Hi, I'm Tim and I want to welcome you to wanttoknowit.com. used with antimony and arsenic. Because lead effectively absorbs electromagnetic radiation of short wavelengths, it is used as a protective shielding around nuclear reactors, particle accelerators, X-ray equipment, and containers used for transporting and storing radioactive materials. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... 118 Names and Symbols of the Periodic Table Quiz. He died by strangulation in a hoist mechanism that he had invented to help him in and out of his bed. In heavy and industrial machinery, sheets and other parts made from lead compounds may be used to dampen noise and vibration. Lead was probably discovered along with silver, with which it is often mixed. with technology today it is ridiculous u dont know who discovered lead! All Rights Reserved. Lead was associated with the planet Saturn and the earth. The scientist who discovered the age of the Earth also helped end the use of lead in gasoline and other products in the United States. After graduating from Cornell University with a degree in mechanical engineering (1911), he worked in Dayton, Ohio, as a draftsman and designer at the National Cash Register Company (where only a few years earlier Charles F. Kettering had developed the first electric cash register) and then at his father’s automobile tire factory.

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