Periodic Table The periodic table is a table‚ where all known chemical elements are arranged. They are organized on the basis of their atomic numbers‚ electrons and chemical properties. The atomic of an element is the same as the number of electrons or protons in that particular atom. They elements in the table are placed in order from the lowest to the highest. 429768018669000The periodic table is ordered into periods and groups. A row of elements across the periodic table is calleda a period
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DEVELOPMENT OF THE PERIODIC TABLE Although Dmitri Mendeleev is often considered the "father" of the periodic table‚ the work of many scientists contributed to its present form. Elements such as gold‚ silver‚ tin‚ copper‚ lead and mercury have been known since earliest times. In 1649 the first scientific discovery of an element occurred. Hennig Brand‚ a German chemist‚ treated urine to a series of processes that resulted in the production of the element phosphorus. Over the next 200 years
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Development of the periodic table ➢ The elements in the periodic table have been arranged in the order of the number of protons (a.k.a. atomic number) The next significant stage in the development of the periodic table was discovered by came from John Newlands. He arranged the known elements in order of their atomic masses. He introduced the ‘law of octaves’ which meant that every eighth element had similar properties. As it didn’t work for all the known elements it was therefore dismissed
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molecule with covalent bond o Formula unit with ionic bond * Molecules: formed by covalent bonds * Lattice energy is the energy released in the formation of an ionic compound. DEFINITION: The formation of an IONIC BOND is the result of the transfer of one or more electrons from a metal onto a non-metal. Characteristics of both bonds: * Occur between 2 atoms * Composed of 2 electrons * Have both ionic and covalent characteristics * Together = 100% * Both bonds are measured
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type of compound usually has higher melting points‚ ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) Ionic compounds usually have higher melting points. This is because the atoms of covalent compounds are bound strongly to each other in stable molecules‚ but those molecules are in general not very strongly attracted to other molecules in the compound. On the other hand‚ the atoms in ionic compounds show strong attractions to other ions in
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Mid Term – October 2014 Bond Pricing Qu 1: Time to Maturity Zero Coupon Rate Discount Factor 1 5% 2 6% 3 7% 4 8% 5 9% Give the formula for the discount factor in terms of the zero coupon rate. Use the formula to fill in the discount factors in the table above (you can write the formula or using excel calculate the numerical value). Assume that the government wishes to issue a new 5 year bond priced at 100 (called a par coupon bond as it is priced at par i.e. the price is the same as the face
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Case 18 Gilda Sears Finance 650: Investments Date: July 22‚ 2010 Table of Contents Summary of Facts 3 Problems 3 Analysis and Solution 4 I. Boston Edison and American Brand 4 II. AT&T and Baltimore Gas and Electric 4 III. Largest potential capital gain 4 Annexures 5 Summary of Facts Gilda Sears who is enrolled in an Investments class has picked a project on bond price theorems. The two main theorems that she decided to illustrate dealt with coupon rate and term-to-maturity
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WORKSHEET FOR PURE AND MIX SUBSTANCES Which of the following methods can be used to separate salt from a mixture of salt and water? A. | | Filtration | B. | | Decantation | C. | | Evaporation | D. | | Sedimentation | Use the following information to answer the next question. The soil present in the backyard of Catherine’s house is very rocky and contains a lot of small rocks. Catherine wants to use this soil to pot some plants. However‚ she first wants to separate the rocky parts
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Professor Tolentino Maria Oyervide EXPERIMENT #4 IONIC AND COVALENT COMPOUNDS Abstract: This experiment was divided in four steps to find the electrical conductivity of covalent and ionic solutions. There were four unknown solutes A‚ B and C. Each had a specific weight and was dissolved in a certain amount of solute to form either the covalent or ionic solution. Covalent compounds are made up of molecules which are electrically neutral. Ionic compounds are composed of ions‚ which are positively
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Plagiarism is when someone uses someone else’s work without giving them credit. “According to the Merriam-Webster Online Dictionary‚ "plagiarize" means: to steal and pass off (the ideas or words of another) as one ’s own to use (another ’s production) without crediting the source to commit literary theft to present as new and original an idea or product derived from an existing source” (Plagiarism.org‚ 2013) Plagiarism is not being truthful about your own work and trying to rewrite in
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