across a laboratory‚ classroom‚ chemistry textbook or lecture theatre that doesn’t contain a periodic table of the elements. It required the immense research and determination of the scientist Dmitri Mendeleev to show us that all elements followed a natural form and provided us with the first decent periodic table. There are 111 elements recognised today by IUPAC and they are arranged in the periodic table in horizontal groups and vertical periods. The eight groups consist of the alkali metals‚ the alkaline
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Your task is to create a dichotomous key to help students WRITE FORMULAE for all the different types of compounds that we have learnt this unit. Your audience will be students beginning their grade ten who have minimal knowledge on writing chemical formulas. They are able to: • Read the periodic table and identify metals‚ metalloids‚ and non‐metals • Identify polyatomic‚ but don’t have them memorized • Read the oxidation states (charges) on the periodic table However‚ you should assume th
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Promethium‚ Pm‚ is the 61st element on the Periodic Table. It was discovered in 1945 by Jacob A. Marinsky. It’s a metal‚ and named after the Greek God Prometheus. It is not naturally occurring‚ but can survive outside of a lab. Promethium has an atomic number of 61‚ which is the number of protons. Its atomic mass‚ protons+neutrons‚ is 145u. It is an isotope. This means that it has a different number of neutrons (84) than the number of electrons and protons (61). Every element changes states
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Overview of Information Systems Table BIS/221 University of Phoenix Material Overview of Information Systems Table Information Systems Types Description / Benefits Example of Each (Including Vendor Name / Vendor Website) How have you seen them used in your organization or an organization that you are familiar with? 1. Databases A database is essentially an electronic filing system. It allows you to quickly select desired pieces of information. An example of a databse program is Microsoft
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in the d-block and it is a transition metal. Technetium is in the 7th group in the periodic table because it has 1 electron on its last shell. Also it is in the 5th period in the periodic table because it has 5 shells. Number of energy levels of Technetium is 5. Its electron shells are 2‚8‚18‚14‚1 as it is in the picture. Firstly‚ Russian chemist Dmitri Mendeleev‚ who is the creator of the periodic table‚ predicted Technetium’s existence. He called it eka-manganese because there was a missing element
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of a job can bring great happiness. That information has enabled me to make the decision of choosing my area of study and career in the field of Information Technology. Many things have lead up to my decision to choose a career in Information Systems. It started at my first semester at my local community college. I was enrolled in their graphic design program and most of the classes I was taking consisted of art classes. My first computer class was working in Adobe Illustrator and Photoshop
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Do young people exercise choice when they engage in acts of crime or are young people constrained or forced to act in socially unacceptable ways? There are a number of different theories that debate whether a young person exercises choice in committing crime or whether they are forced or constrained by other factors‚ to act in socially unacceptable ways. The following essay will examine a variation of individual‚ situational and structural theories that attempt to understand why young people
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Table Tennis History Like many other sports‚ Table Tennis began as a mild social diversion. It was probably played with improvised equipment in England‚ during the last quarter of the 19th century. Though Table Tennis evolved‚ along with Badminton and Lawn Tennis‚ from the ancient game of Tennis (also known as Jeu de Paume‚ Real tennis‚ Court Tennis or Royal Tennis)‚ the game was developed after Lawn Tennis became popular in the 1880s. Game manufacturers tried many experiments to market
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HISTORY OF TABLE TENNIS Ping Pong Anyone? The sport got its start in England towards the end of the 19th century when‚ after dinner‚ some upper-middle class Victorians decided to turn their dining room tables into miniature versions of the traditional lawn tennis playing field. Several different every-day objects were employed in constructing the sport. They used a line of books as the net. Rackets were lids from empty cigar boxes‚ and a little later‚ parchment paper stretched around a frame. The
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A CCOUN TlNG FUNDAMENTALS FOR CONS TRUC TlON DANIEL W. HALPIN‚ BOLIVAR A. SENIOR Copyright 02009 by John Wiley & Sons‚ Inc. All rights reserved APPENDIX C COMPOUND INTEREST TABLES 275 P1: OTA/XYZ P2: ABC JWBT106-APP-C 276 JWBT106-Halpin June 26‚ 2009 8:56 Printer: Sheridan Books COMPOUND INTEREST TABLES TABLE C.1 0.25% Compound Interest Factors Single Payment 0.25% Uniform Payment Series Compound Amount Factor Present Worth Factor Sinking Fund Factor Capital Recovery Factor
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