Bibliography: Page: Lagemaat‚ R. v. (2005). Theory of knowledge for the IB Diploma. Cambridge: Cambridge University Press. Periodic Table of Elements and Chemistry. (n.d.). Periodic Table of Elements and Chemistry. Retrieved February 24‚ 2012‚ from http://www.chemicool.com/ Valence-Shell Electron-Pair Repulsion Theory (VSEPR). (n.d.). Purdue University College of Science Welcome. Retrieved February 24‚
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of chemical elements that are close to each other in the periodic table. When elements are arranged in order of increasing atomic number‚ their physical and chemical properties recur periodically. This periodicity stems from the valence electronic configurations of the elements. This arrangement of elements in the order of increasing atomic number with the elements having similar properties placed in vertical columns is known as periodic table. ____________________________________________________________________________________
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significant figures in any of the numbers used in the calculation. Periodic Table Isotopes are atoms of the same element with different masses. Isotopes have different numbers of neutrons. The periodic table is a systematic catalog of the elements. Elements are arranged in order of atomic number. Elements in the same group have similar chemical properties Nonmetals are on the right side of the periodic table (with the exception of H). Metalloids border the stair-step line (with
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have any fun But sometimes their neutrons Cannot find where they are Due to the empty land Around Nucleus that is very far. Uranium is an element‚ And in case you wern’t aware Elements are the building blocks Of the sea‚ land‚ and air. On the periodic table Located to the right It’s the element U‚
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Metals & Non-Metals Metals: Good conductors of heat and electricity. Have shining luster. Malleable (this means that they can be hammered or distorted). Ductile (this means that they can be drawn into wires). Most have high melting and boiling points. Are sonorous (give out sound when beaten). Usually solid at room temperature. An exception to this is mercury‚ which is liquid in nature. Examples: Aluminum‚ Gold‚ Copper‚ Silver‚ Sodium‚ Potassium‚ Mercury. Corrode or oxidize in
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Name: ____________________________________Period: _____ Date:____________ Lab 9: Formula of a Hydrate Lab Purpose: To utilize mole conversions to determine the ratio between copper (II) sulfate molecules and water of hydration. Materials: 1 Hot Plate 1 Wire Mesh 1 Small beaker 1 Glass Stirring Rod 1 Electronic Scale 1 Crucible Tong Copper II Sulfate Hydrate (approx. 5g) Procedure: 1. Mass small beaker (empty) 2
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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 other in the periodic table. When elements are arranged in order of increasing atomic number‚ their physical and chemical properties recur periodically. For example‚ magnesium‚ calcium‚ and strontium are all hard‚ very reactive‚ silvery metals while neon‚ argon‚ and krypton
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Sample Midterm Examination The midterm examination is two (2) hours long. In the actual examination you would not be allowed to consult your books or notes; however‚ you would be able to use a calculator. We strongly recommend that you sit this examination as if you were writing it in an invigilated setting. You will get a much better idea of your degree of preparedness for the actual examination. Part A: Short–answer Questions (1 mark each) 1. Calculate the density of bromine‚ given that 120.0
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this paper is 120. The marks for individual questions and the parts of questions are shown in round brackets: e.g. (2). There are 10 questions in this question paper. There are 24 pages in this question paper. Any blank pages are indicated. A Periodic Table is given on page 2. Advice to Candidates Write your answers neatly and in good English. Total This publication may be reproduced only in accordance with Edexcel Limited copyright policy. ©2009 Edexcel Limited. Printer’s Log. No. N33982A W850/U4335/57570
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beans. 4. Measure the mass of each cup and record the value in your Data Table. 5. Count out 60 beans of each variety and place them in their respective cups. 6. Measure the masses of your cups with their contents and record these values in your Data Table. 7. Return each kind of bean to its original container. 8. Clean up your work area and wash your hands before leaving the laboratory. Data Data Table – Relative Mass of Beans Bean Variety | Navy | Kidney | Pinto | Lima |
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