Lesson 3.01: History of the Periodic Table 1. Explain how scientific observations led to the development of‚ and changes to‚ the periodic table. Dmitri Mendeleev- first periodic table‚ organized 63 known elements according to properties‚ organized into rows and columns. He wrote names‚ mass and chemical properties on each. Julius lothar Meyer- independently worked in German ‚ similar to Mendeleev Henry Gwyn Jeffrey’s Moseley: worked with Ernest Rutherford experimented with 38 metals‚ he found that
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Two conditions for equilibrium are that the net force acting on the object is zero‚ and the net torque acting on the object is zero. In the experiment done‚ conditions for equilibrium are observed. Equilibrant forces were determined using the force table and component methods. The unknown forces were also determined using the first and second conditions for equilibrium. Another part of the experiment was to locate the center of gravity of a composite body and to determine rotational equilibrium.
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China is a country with 5000-years-long civilization and a long and rich history‚ so Chinese like to pay more attention to the etiquette‚ especially in the table manners. Most foreigners do not know table manners when they join in Chinese dinner party because Western dining is different with Chinese. Chinese table manners have three important parts‚ including place setting‚ taboos‚ and toast. Firstly‚ the seating arrangement is one of the important parts of dinning etiquette because the order of
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the history of its international operations (if applicable) Innospark is a company created by Vita Markevičiūtė. Innospark produces and sells educational toys for children. Creative education is what they believe in. The educational play light table is their main product and it develops the creativity and the constructive thinking of the children. In June 2012‚ Innospark was created in Lithuania. The owner of the company developed it quickly and succeeded to make his first sales revenues in October
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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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January 31‚ 2013 The Kitchen Table Never have I taken the time to think of the significance of the kitchen table in my life‚ but I have come to realize that my kitchen table has always been a place to unwind and share with my family members. From childhood to my adult hood‚ I have always come to the kitchen table in celebration‚ conference‚ in search of security‚ and enjoyment. The kitchen table of the past always brought my family together‚ and the table in my present brings focus to my school
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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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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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Project: «Japanese Table Manners» Made by Oleh Hurskiy Group - 11 Say "Itadaki masu!" In Japan‚ you say "itadakimasu" ("I gratefully receive") before eating. O When eating from shared dishes‚ move some food from the shared plates onto your own with the opposite end of your chopsticks or with serving chopsticks that may be provided for that purpose. Chopsticks are used to eat most kinds of Japanese foods‚ with some exceptions. Some of the most important rules to remember when dining with
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