Chemical elements

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  • Essay On Zinc

    transition series of elements, consisting of Sc, Ti, Cr, Mn, Co, Ni, Cu, Zn, Cd and Hg. All these elements belong to group 12 of periodic table. Zinc has an atomic number 30, an atomic mass of 65 and one main oxidation state (+2). Zinc has five nature isotopes . Zinc is the 24th most abundant element in the earth’s crust. Its properties is very similar to Cd.Zinc is very useful in biological systems. Zinc also is involved in many biochemical processes that support life and required for a host of physiological. it is an one of the most essential plant micronutrient and it play a major role in growth and metabolism, mainly in enzyme activation, metabolism of carbohydrates, lipids, nucleic acids, gene expression and regulation, protein synthesis and reproductive development of plants (Marschner, 1995). It is estimate that More than 30% of soils have low Zn availability. So, Zn is also one of the most deficient micronutrient in soils worldwide (Cakmak, 2002; Shivay et al., 2008) Occurrence…

    Words: 359 - Pages: 2
  • How Did Demitri Mendeleeve Invented The Periodic Table

    Demitri Mendeleeve was a Russian chemist who invented the first periodic table in 1869. The periodic table he made was very different from the modern day periodic table we know today. Henry Moseley updated Mendeleev's version of the periodic table in 1915. This is more like the periodic table that we know and use today. The only difference is that there has been many more elements added. Mendeleeve also had predicted a lot of the characteristics and properties of elements that would fill up…

    Words: 1007 - Pages: 5
  • The Disappearing Spoon Analysis

    lives and the lives of those before us, have been unknowingly (or knowingly) shaped by elements. In The Disappearing Spoon, the author Sam Kean, discusses the wonderful world of the periodic table in depth. Within the first nine chapters of the novel, Kean explains the importance of location on the table, origin and discovery of each element, and its impact on other aspects of human life. Through various tales, the table is pulled apart and analyzed in an ingenious way. To a reader, it is…

    Words: 1183 - Pages: 5
  • The Periodic Table: The Discovery Of Elements

    all of the elements that have been discovered and has them arranged and by their chemical properties, atomic masses, and electron configurations. In order to construct the periodic table, every element had to be discovered. Elements such as gold, tin, lead, and copper have been widely known and used since ancient times, however, the first discovery of an element wasn’t made until 1649 by Hennig Brand when he discovered phosphorus. Over the next 200 years, chemists would acquire the basic…

    Words: 985 - Pages: 4
  • Magnesium Alloy Essay

    steel is an alloy and Iron is an element. Steel is also called as an alloy of iron, with the content of carbon controlled. 4% of carbon in Iron makes it Cast Iron and when the carbon content is less than 2%, the product is steel. Cast Iron is made from pig iron, which is the by-product of smelting of iron from an iron-foundry. Mild steel, which is also known as plain carbon steel, approximately contains 0.05-0.15% of carbon. This makes it malleable and ductile. Mild steel has a relatively low…

    Words: 1122 - Pages: 5
  • John Dalton's Atomic Theory

    with the examining the composition of the universe. The early Greek philosopher, Thales, argued that the world was made up of one universal thing; water. It wasn’t until Democritus and the Atomist until philosophers began to rationalize about small particles called atoms as the things that make up the universe. As time approached the 18th century, advances in the scientific method gave rise to developing processes to examine the composition of gas molecules and the molecular weights of the atoms…

    Words: 1034 - Pages: 4
  • Birthtone Research Paper

    economy in many ways. More importantly, birthstones have a deep connection to chemistry and science. Due to their chemical properties, birthstones can also be used for medicinal purposes and healing techniques that have helped humans throughout time. Overall, birthstones contain many disciplines and the concept is one of the most interesting created during the Anthropocene, the era marking the dominance of humans. The history of birthstones is mostly theory and speculation. Birthstones’ history…

    Words: 1853 - Pages: 8
  • Silicon Carbide Conclusion

    2.1 Silicon-Carbide (SiC) Initially, Silicon carbide (SiC) was accidentally introduced by Edward G. Acheson in 1890. Silicon Carbide can be stated as a chemical compound of Silicon and the carbon. Edward G. Acheson was running an experiment on the synthesis of diamonds. At that time, it was produced by a high temperature electro chemical reaction of sand and carbon. We can also find the silicon carbide very rarely in nature in very small amounts. Also Edward G. Acheson was the first person to…

    Words: 1718 - Pages: 7
  • Essay On John Dalton

    mixture of gases was equivelent to the sum of partial pressures that each gas applied while commanding the same space. In the early 1800's, while Dalton was studying the nature and chemical makeup, he found that it was not a chemical solvent, as other scientists had thought. While composed of small individual particles, it was a mechanical system that used pressure applied by gas. Which in 1803, this experiment led to "Dalton's Law of Partial Pressures". This law usually applies to ideal gases…

    Words: 855 - Pages: 4
  • Phase Transformation Lab Report

    temperature is further decreased from 1200°C to 1000°C, number of clusters start reducing and finally disappear below 1000°C. At temperature below 550°C, there is no precipitation of Ni2Cr particles and we get a homogenous alloy at room temperature. Figure 2: Microstructure of Ni68Cr32 at 1100°C [1] Need for addition of other alloying elements The solid solubility of Cr in Ni at room temperature is approximately 37%. For most of the commercial applications, % Cr is less than 30%. As a result,…

    Words: 1238 - Pages: 5
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