The Four Elements Some things on Earth are everlasting‚ and according to Empedocles those things are the four root elements. These elements are fire‚ air‚ water and earth. They’re essential to life and therefore an eternal part of the world. Their importance speaks volume of their existence and they do not get created nor perished‚ they just exist. That is the argument that Empedocles is making‚ these elements are eternal and cannot be destroyed. Empedocles asserts that fire‚ air‚ water and earth
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MATHEMATICS SL INTERNAL ASSESSMENT TYPE 1 LACSAP’S FRACTIONS 10/11/2012 Tracy Braganza IB2T In mathematics‚ Lacsap’s fractions are based upon Pascal’s triangle. In this portfolio‚ the aim that was given was to consider a set of numbers that are presented in a symmetrical pattern‚ deduce a general statement and also to determine the limitations of the general statement that have been found. The answers in this portfolio will be attained with the help of a GDC calculator (GDC – TI84 Plus
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idea that all things are elements or combinations of elements can be found in the writings of the ancient Greeks and other early peoples. Although this idea may seem simple‚ it is very difficult to decide if a substance is indeed an element or a compound. There were twelve chemical elements discovered in ancient times‚ but it was not known that they were elements. Another 76 elements were discovered between 1557 and 1925. Many mistakes were made in the discovery of the elements and the term ‘chemist’
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Chemistry Purpose: Finding the general properties of elements through tests and then being able to organize the metals‚ nonmetals‚ and semimetals on the periodic table. The purpose of this lab was achieved. As a class we were able to take the elements and then test them to find out their individual properties. We were then able to distinguish if the element was a metal or nonmetal based on the property’s we found. We then placed the elements on our own periodic table sorted by atomic order. One
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property of carbon element responsible for a large number of compounds having carbon. (1) 8. On what basis did Mendeleev arrange the elements in his periodic table? On what basis are they arranged now? (2) 9. Three elements A‚B & C have electronic
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pure substance – element mixture – homogeneous pure substance – compound mixture – heterogeneous 1. HCl (aq) mixture – homogeneous 2. sugar pure substance – compound 3. KBr (s) pure substance – compound 4. soil mixture – heterogeneous 5. Cl2 (g) pure substance – element 6. water pure substance – compound 7. CH2(OH)2 (aq) mixture – homogeneous 8. sodium pure substance – element 9. Hg (l) pure substance – element 10. iron oxide pure
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Group IA‚ IIA and IVA elements. Each of the samples was placed in a test tubes and the physical state‚ color‚ and appearance was identified. The solubility of the element was tested through the use of water. The Group IIA Metal Oxides was tested through the use of the pink and blue litmus paper. Also a balanced equation was written to show the reaction between oxides and water. II. INTRODUCTION Chemical periodicity is defined as the similarities of chemical elements that are close to each
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Ever heard of the element Bismuth? Bismuth (Bi) is atomic number 83‚ and its weight is 208.98040. This element is not one of the more popular ones that most people know; like Cooper (Cu)‚ Aluminum (Al)‚ and Hydrogen (H). Even though bismuth may not be one of the elements that everyone knows‚ there is many objects that we use that has bismuth in it. Once a person reads bismuths biography‚ and learns what objects has bismuth in them; it is actually a neat element. Bismuth was discovered by an unknown
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halogen element Any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F)‚ chlorine (Cl)‚ bromine (Br)‚ iodine (I)‚ astatine (At)‚ and element 117 (temporarily named ununseptium [Uus]). They were given the name halogen‚ from the Greek roots hal- (“salt”) and -gen (“to produce”)‚ because they all produce sodium salts of similar properties‚ of which sodium chloride—table salt‚ or halite—is best known. Because of their great
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Sodium‚ one of many elements in the periodic table is being used in everyday life‚ it is also an essential element within your body. It is just another element‚ but one of the differences is that this element is something that most people consume every day. Sodium has played an important role in everyday life because of its uses in medicine‚ industry‚ and agriculture(Shriver). Sodium was discovered in 1807 by a man named Sir Humphrey Davy. He was well known for his discoveries of most alkali metals
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