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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mass of an element‚ but not the electrons? We generally do not use the number of electrons when calculating the atomic mass of an atom because they weigh so little (precisely 1/1836 AMU)‚ and only in precise calculations are the masses of the electrons included in atomic mass. 2. What was the difference between Mendeleev’s table and Mosley’s new arrangement? Mendeleev arranged the 63 elements know at his time in order of increasing relative atomic mass‚ whiles Mosley later order the elements in order
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to group elements with similar properties in to groups of three or triads. This began when he noticed that the atomic weights of strontium (Sr) were halfway between Calcium (Ca) and Barium (Ba). He stated that nature contained triads of elements in which the middle element had properties that were an average of the other two elements. In 1863‚ John Newlands‚ an English chemist‚ proposed the Law of Octaves‚ which stated that elements repeated their chemical properties every eighth element. The musical
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Wiccans‚ the fifth element is known as the "spirit". The word Akasha is actually a Sanskit word "meaning aether in both its elemental and metaphysical senses" (according to Wikipedia). Origin of Akasha is Hindi. Akasha is also taken to mean sky‚ by way of Hindu and Gujarati Indian languages. This is why Wiccans also associate Akasha with outer space or "the void". Akasha is seen as the omnipresent spiritual power‚ that permeates the universe. It is the energy out of which the Elements formed.
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