Pineda‚ Carlitos Miguel Ponce M. January 9‚ 2013 AIT2A Natural Science 12 ATOM DEVELOPMENT WITH SCIENTISTS INVOLVED 400 B.C. - Democritus’ atomic theory posited that all matter is made up small indestructible units he called atoms. Democritus expanded the idea to state that matter was composed of small particles called "atoms" that could be divided no further. These atoms were all composed of the same primary matter with the only differences between them being their size‚ shape
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ORGANIC CHEMISTRY • Inductive Effect : Inductive effect is defined as permanent displacement of shared electron pair in a carbon chain towards more electronegative atom or group. Types of Inductive effect : 1.Negative Inductive Effect : (—I effect‚ Electron withdrawing effect) when an electronegative atom or group (more electro negative than hydrogen)is attached to the terminal of the carbon chain in a compound‚ the electrons are displaced in the direction of the attached atom or group
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Chemistry 12 Unit 1 - Reaction Kinetics Chemistry 12 Worksheet 1-3 - Reaction Mechanisms 1. It is known that compounds called chlorofluorocarbons (C.F.C.s) (eg. CFCl3) will break up in the presence of ultraviolet radiation‚ such as found in the upper atmosphere‚ forming single chlorine atoms: CFCl3 CFCl2 + Cl The Cl atoms then react with Ozone (O3) as outlined in the following mechanism. Step 1: Step 2: Cl + O3 ClO + O2 ClO + O Cl + O2 (single "O" atoms occur naturally in the atmosphere
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Nassau Christian Schools History Revision Book 2010 Amerindians Theme 1 Amerindians possibly came from Asia -- from an area called Mongolia. The Amerindians are said to be descendants of the Mongoloid people. Their ancestors were nomadic hunters from East - Central Asia. They migrated into America by an ice (land) bridge covering the Bering Strait over 20‚000 years ago. Today the term Mongoloid only applies to the ESKIMOS. Amerindians are classified as a different race because of biological
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Aristotle. Also plato was Aristotle teacher at the Acadamy at the time. It wasent untill 2000 years after no one questioned the theory of atoms‚ untill the early 1800’s. John Dalton was born in 1766 in Cumberland‚ England. Dalton made many experiment strictly to atom study even though he had no idea what is was. He is most known for the extensive research on atoms. He proposed a table of atomic weights for the number of the known element. This image is Dalton’s table of elements and the number of elemental
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Revision Essay A lot of literature has been written about motherhood. Wordsworth is a well known English poet who mentions motherhood and female strength in several of his poems‚ including the Mad Mother‚ The Thorn‚ and The Complaint of a Forsaken Indian Woman. This leads some critics to assume that these poems reflect Wordsworth ’s view of females. Wordsworth portrays women as dependent on motherhood for happiness‚ yet he also emphasizes female strength. The poem The Mad Mother describes a woman
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THE CHEMISTRY OF LIFE (Review 1-7) I. Basic Chemistry A. Elements 1. Definition- an element is a substance composed of a single type of atom 2. Major elements of the human body 3. Trace elements of the body B. Atoms 1. Definition- the atom is the smallest part of an element which cannot be broken down further by ordinary chemical means. Atoms are composed of protons‚ neutrons and electrons. 2. Particles that make up atoms
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Physics 102 Atoms to Galaxies (Lecture Sec. 5 / Lab Sec. 6) Spring 2011 Lecturer: Dr. Shang-Fen Ren Moulton Hall 312 C (309) 438-5246 Email: phy102ren@yahoo.com Lectures: 9:35 am – 10: 50 pm‚ Tuesday and Thursday Class Website: http://www.phy.ilstu.edu/~ren/phy102ren Textbook Companion Site: www.wiley.com/college/trefil. Hands on Activities: Open labs‚ Moulton 202 & 204 (tentative schedule) Monday closed Tuesday - Friday: 10:00 am to 4:00 pm Office Hours: 10:50am
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What You Need To Know for the Chemistry Regents Exam The Test The Chemisty Regents Exam is broken down into three sections: Part A: 35 mulitple choice questions from all units covered over the course of the school year. Part B: Approximately 25 questions‚ with a mix of short answer and multiple choice. Questions focus on the Reference Tables‚ graphing‚ and laboratory experiments. Part C: Approximately 15 short answer questions‚ most broken down into smaller parts. This is often an
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BUSINESS STUDIES Paper 2 0450/02 May/June 2003 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name on all the work you hand in. Write in dark blue or black pen in the spaces provided on the Question Paper. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Answer all questions. At the end of the examination‚ fasten all your work securely together
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