Lead Many elements, like lead, are very important to the structure and formation of many of the products we use. Throughout history, lead has been developed, mined, extracted, and used. Lead, since its finding thousands of years ago, has proven to be a tricky element with many diverse health effects. Scientists have developed products, and processes that still continue to used lead. Lead is an extremely important and influential element in our daily lives. Lead has many different physical and chemical properties. Being a solid at room temperature, lead is the heaviest member of the carbon family (1). Lead can by physically described as a soft metallic gray color, and tends to be formed naturally with jagged edges. It is also a very ductile and malleable element. When exposed, rust tends to form on the surfaces of lead. Being a softer element, Lead can be easily bended, cut, pulled and changed (2). Compared to other elements, when used to conduct electricity lead does very poorly. Lead also has many Chemical properties. Lead has very few chemical properties. Lead does not burn, dissolves very slowly in cold water/ cold acid, and slightly faster in warm acid (1). …show more content…
Lead is commonly referred to as Pb due to its chemical symbol on the periodic table (7). The Element as has an atomic number of 82 (7). From its atomic number, scientists can conclude that a natural element of lead contains a total of 82 protons, and 82 electrons (8). Lead also has an atomic mass of 207.2 (7). Being that the atomic mass is the number of protons plus the number of neutrons, scientists concludes that an atom of lead contains 125 neutrons along with the 82 protons (8). Lead is considered a poor metal on the periodic table. Lead is also in the p block of elements which means that its valence electrons will be in a p shell (8). Overall, the periodic table is a prime way to learn about the basics of
Regulations are created to protect the health and welfare of the public. The United States EPA develops the regulations at a federal level and each state’s EPA has the ability to make regulations pertaining to their state. The criteria for a state’s individual regulation are that it must be at least as strict as the federal regulation. The purpose of this paper is to examine the general requirements of the Lead and Copper Rule (with attention on the lead aspect) mandated to protect drinking water on the federal and state level.
Neidig, H. A., and J. N. Spencer. "Precipitating Lead Chromate on a Small Scale." General Chemistry For Engineering And Science. Mason: Cengage Learning, 2012. 83-90. Print. Signature Lab Ser.
This is why the Flint water crisis is so critical today. Because young children are being exposed to lead and they should actually be screened from the lead. The pipelines with lead in the water system and the whole community of Flint, not being able to drink water out of the facet as well as not being able to
The novel Crispin: The Cross of Lead, written by Avi, is a medieval tale that intertwines drama and action with an underlying theme of the intersection of fate and social status. The book is set in England in 1377, during Europe’s dark ages, and its protagonist is a peasant boy on a feudal manor. Social structure during this time was very rigid, and Avi uses it as both context and a theme. Crispin, as a serf bound to his lord’s land, is at the bottom of the hierarchy. But as he grows and becomes more independent, Crispin discovers that he can transcend the social boundaries that precluded his freedom for so long.
Lead is a metal found virtually everywhere even today. Sources of lead include auto body shops, electric storage batteries, glazes for china dishes, crockery, insecticides, electric cable insulation, hose, pipe, sheet and floor coverings. Lead is associated with stain glass work, jewelry making and antique ceramic doll painting. Although lead in paint was outlawed, there are still many homes that have lead paint (White et al, 1990). Lead found in gasoline was found in one study to account for 23--27% of the lead blood levels in the people tested (Wagner, 1991). This exposure to lead sources is more of a concern for children due to the characteristic habit of children to taste everything they touch; this characteristic is known as pica. Children are also in closer contact with their lead polluted environment during play. They are more active and exposed to outdoor contaminates and they inhale dust and dirt that are lead contaminated. Furthermore, the adsorption rate of lead in the digestive tract is up to 10 times greater in chil...
One out of every six children under the age of six are suffering from health disorders due to the poisonous metal, lead. Lead is a natural occurring bluish-gray metal found in the earth's crust. It has no taste or smell. Lead can easily be found in all parts of our environment today. Most of it comes from mining, manufacturing, and the burning of fossil fuels. In the United States lead poison has increased because of the lack of knowledge in our society. Lead is released into the environment by industries, the burning of fossil fuels or wastes.
Silver has been used since prehistoric times and it has and still plays an important role today. We do not know which person discovered it, but what we do know is that the Ancients discovered it. Silver has a special place in the history of the elements because it is one of the first five metals used and discovered by humans. The other four elements that were used and discovered by humans were gold, copper, lead, and iron. Silver objects from before
People can’t stress this enough: Toys with lead can harm children’s brain development and their future. In wooden toys sold on the local market, lots contained lead higher than 10 mg/dL.
...o its poor wettability, reliability, strength, easy oxidation and microvoid formation. In order to overcome these drawbacks and to further enhance the properties of Sn-Zn lead free system small amount of alloying elements such as Bi, Cu, In, Ag, Al, Ga, Sb, Cr, Ni, Ge were added as suggested by many researchers.
Researchers at Virginia Tech sampled the lead in homes in Flint and found that 40% of homes had over 5 ppb of lead, and 16% of homes had over 15ppb6 which is the level at which the EPA recommends children and pregnant women avoid drinking the water. According to our textbooks, children exposed to lead can exhibit decreased intelligence, behavioral problems, and gastrointestinal issues.7Lead poisoning, leading to seizures and comas, can occur as well with very high exposures. Lead exposure can have terrible consequences, and for government agencies to ignore it for as long as they did is
Drinking water contaminated bt lead is not a new problem. Lead was authentically used to produce pipes. It is an universal metal that has been used throughout the years, as a fundamental component in various products such as radiation, shielding, plumbing, gasoline, ceramic glazing, children’s toys, and paints. Its long history of use and distribution means lead exposure and its health effects are
Lead is one of the oldest metals known to man. Lead was the first discovery out of all metals in Australia. The Geraldine located on the Murchison River was the first lead mine in Australia. This mine operated in the 1950’s and the 1960’s after Augustus Gregory (explorer) discovered lead while looking at the landscape for developments. He came to this discovery when he was crossing the river on his horse. He
Transition metals are a group of metals that are considered dense and have high melting and boiling points. They are located between the alkaline earth metals group and the boron group. The transition metals are characterized by the number of inner energy levels that are occupied by the atoms. They are then separated into 2 groups: d-type transition metals and f-type transition metals. D-type transition metals are mostly consisted of important metals (commercially) and the rare and unimportant metals. They are ranged from very reactive to noble. The metals in this group all form a variety of different alloys. The f-type transition metals consists of lanthanides (rare earth metals) and actinides which is from thorium to lawrencium. These metals are very reactive. Only a few of these elements are common but several of the f-type elements are useful. For example, cerium and thorium, which are found in alloys, uranium and plutonium in nuclear reactors.
This number of electrons, more specifically valence electrons, makes mercury easily bondable with other elements, “namely gold, silver, and zinc” (Jefferson Lab, The Element Mercury). By subtracting the atomic number, 80, from the elements mass in AMU, Mercury is known to have 121 neutrons. As with almost every other element, the number of neutrons in this element differs either giving it a