HISTORY OF ATOM: Atom is the basic unit of matter, the smallest unit of an element, atom consists of electrons, protons, and neutrons, and all matter is made of atoms. Atoms are indivisible and indestructible. All atoms of a given element are identical in mass and properties. Compounds are formed by a combination of two or more different kinds of atoms. A chemical reaction is a rearrangement of atoms; atoms can be neither created nor destroyed. BONDS BETWEEN ATOMS: Bond between atoms, the very heart
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The synthesis of a novel palladium-phosphine catalyst and its Sonogashira cross-coupling activity. ________________________________________ Chemical catalysis was investigated through the synthesis of a palladium catalyst (Figure 1) containing the novel phosphine ligand 1-naphthyl(diphenyl)phosphine. A Sonogashira cross-coupling reaction catalyzed by the new palladium catalyst was carried out and compared to the results observed using a common catalyst, Palladium dichlorobis(triphenylphosphine)
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DiFabio Physics 202 Lecture UL-Lafayette, Fall 2013 Halliday, Resnick, Walker (Chapter 21) Introduction to Electric Charge • Electric charge is an intrinsic property of the elementary particles that make up atoms. • Atoms • Nucleus consisting of protons (positive charge) and neutrons (no charge) • Electrons (negative charge) orbit the nucleus. • Like charges repel, while opposite charges attract. • Everyday objects have equal amounts of positive and negative charge, so they have no net charge.
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Chapter 3 MULTIPLE CHOICE QUESTIONS Part 3: Syror och baser (Answers on page 18) Topic: Acid-Base Definitions 1. According to the Lewis definition, a base is a(n): A) Proton donor. B) Electron pair donor. C) Hydroxide ion donor. D) Hydrogen ion donor. E) Electron pair acceptor. 2. Which of the following is not both a Bronsted-Lowry acid and a Bronsted-Lowry base? A) HSO4! B) H2PO4! C) HCO3! D) OH! E) SH! 3. Which of the following is not a conjugate acid - conjugate base pair (in
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Table of Contents 1.0 Introduction 2 2.0 Introduction of Porter Five Forces Framework 2 2.1 Threat of substitutes 3 2.2 Risk of entry by potential competitors 3 2.3 Bargaining power of buyers 4 2.4 Bargaining power of suppliers 4 2.5 Intensity Of Rivalry 5 3.0 Porter Five Forces on Chosen Organization 5 3.1 Threat of Substitutes 6 3.2 Risk of Entry By Potential Competitors 6 3.3 Bargaining Power of Buyers 6 3.4 Bargaining Power of Suppliers 7 3.5 Intensity of Rivalry 7 4.0 Conclusion
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Lab Report 3: Effect of UV Light on Microbial Growth Kristin Holmes – April 2, 2013 PURPOSE: The purpose of this lab is to determine the effects of ultraviolet light on microbial growth and the effectiveness of the repair mechanisms of light repair and dark repair on UV damage. INTRODUCTION: Can Ultraviolet (UV) light be a viable form of sterilization and/or disinfection? This lab experiment will look to examine and answer that question. UV light is a form of electromagnetic radiation that is
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Module 3 Waves and the Electromagnetic Spectrum Topic: Waves 1. What is a wave? A wave is vibration that travels and all waves are created by something vibrating. Waves transport energy but do not transport mass. 2. Describe the following terms associated with waves: a. amplitude height of wave b. wavelength length of a wave c. frequency number of waves per second (Hz) d. period how long a wave lasts when it arrives at a fixed point (measured in seconds) 3. What are radio waves
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the Sun may have been triggered by shockwaves from one or more supernovas. The Sun does not have a definite boundary as rocky planets do. Through most of the Sun's life, energy is produced by nuclear fusion through a series of steps called the proton–proton chain. This process converts hydrogen into helium. The Sun is a magnetically active star that supports a strong, changing magnetic field that varies year to year and reverses direction about every eleven years around solar maximum. The Sun's
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phosphate and anaerobic glycolysis. The runners can perform almost without breathing, using energy stored as ATP, creatine phosphate and glycogen which is anaerobic metabolism in the active muscles. In contrast to long distance runners, sprinters are often large. Muscular people. Sprinters have dominance of so called fast twist or anaerobic muscle fibers. Those remarkably high speeds can only be maintained while stored high energy phosphate in the form of phosphocreatine is present, however phosphocreatine
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Treatment options are surgery, radiation therapy, chemotherapy, and proton therapy. In some cases though, the risk of the surgery outweighs the benefits of surgery. One treatment for spinal cancer is corticosteroids. This treatment option is to reduce inflammation and swelling around the spinal cord. Emergency surgery can
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