Element: Simplest form of matter to have unique chemical properties. Atom: The smallest particles with unique chemical identities. Nucleus: Center of an atom (composed of protons and neutrons). Proton: Have a single positive charge (+1). Neutron: Have no charge. Electron: Tiny particles with a single negative charge and very low mass (-1)/determines chemical bonding properties of an atom. Atomic Number: Number of protons in the nucleus. Atomic Mass: Approximate number of protons and neutrons
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Will County was established in Illinois in 1836. From that year on‚ Will County has only grown in size and in numbers. Larger cities like Joliet‚ Lockport and Plainfield stand place in this County. There are also a number of other townships and villages that are spread out throughout the county. However‚ the area was not left untouched from the beginning of time until the year 1836. The Will County area was an established community of Potawatomi tribes and served as a trading route for the fur trade
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changes are used to describe matter. A property is a trait of matter‚ when that sample of matter is in a fixed state. There are two different types of properties: physical properties and chemical properties. A change is something that alters the properties of a substance. There are two types of changes: chemical changes and physical changes. A physical property is a property that can be observed without changing the makeup (or composition) of a substance. Some examples of a physical properties
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Chemical Periodicity ------------------------------------------------- ABSTRACT The experiment chemical periodicity shows the properties and reactions belonging to group IA‚ IIA‚ and IVA. Proper procedures and observations were done to determine the solubility‚ physical state‚ color‚ and appearance of the compounds namely Li2CO3‚ Na2CO3‚ K2CO3‚ CaCO3‚ and BaCO3. The results shows that Li2CO3‚ Na2CO3‚ K2CO3 were soluble in water‚ while MgCO3‚ CaCO3‚and BaCO3 were not soluble. All of these compounds
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Chemical Reactions & Equations CHEMICAL REACTION : In a reaction when the original state of the particle changes and it cannot be reversed by simple physical means‚ this type of reaction is known as chemical reaction. Example :- Fermentation of grapes‚ burning of wood etc. In this reaction we have seen that after burning of wood‚ coal is formed and we cannot make wood from coal. PHYSICAL REACTION : In a reaction when original state of the particle can be recovered by any means then this type of
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UV5319 May 10‚ 2010 B CORPORATION: A NEW SUSTAINABLE BUSINESS MODEL “We envision a new sector of the economy which harnesses the power of private enterprise to create public benefit.” —B Lab‚ “Declaration of Interdependence‚” 2010 Introduction Jay Coen Gilbert and Bart Houlahan were friends as undergraduates at Stanford University. In 1993‚ a few years after graduation‚ they helped start the basketball shoe and apparel company AND1. As the company grew‚ cofounder Gilbert and president
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Chemical Senses OLFACTION The sense of smell. Begins with the detection of molecules suspended in the air Olfactory stimuli Must be soluble in fat Taken through the nostrils and circulated within the nasal cavities connected to the nostrils. Olfactory epithelium Thin sheet of cells which contain neural receptors for olfaction Contains olfactory receptor cells and glia-type support cells that produce mucus Also contains basal cells which give rise to new receptors when needed Olfactory
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Chemical bond From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds"
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ALEXIS STUDENT: LARIZA VALERIA CHONG FLORES KENT CHEMICAL: ORGANIZING FOR INTERNATIONAL GROWTH KENT CHEMICAL: ORGANIZING FOR INTERNATIONAL GROWTH Kent Chemical was a rubber producer which founded in 1917 in Kent‚ Ohio. In the 1940s‚ as turned into the plastics‚ Kent quickly grew to be one of the biggest producers and marketers of plastic additives and other specialty chemicals. Later‚ in the 2000s‚ Kent became a worldwide specialty-chemical company‚ whose products sold in nearly 100 countries
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The Chemicals of the Super Bowl Cory Barnett HSM 320: Emergency Response to Terrorism Instructor Kelly George September 2‚ 2013 The Chemicals of the Super Bowl The Super Bowl‚ a prime place where thousands of people come to celebrate‚ party and get together with others for an exceptional good time. All it would take is for one terrorist attack to change all that in the matter of minutes. The amount of mass confusion and mass injuries that could happen would be completely on the terrorist’s
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