Chemistry

interpersonal chemistry Lecture 1 Introduction to Chemistry What is Chemistry? Chemistry is the cognition that investigates and explains the structure and properties of matter. Why is Chemistry beta? Almost every(prenominal) foods, beverages, and cleaning products have chemic manifolds in them to have-to doe with fallal or remove dirt. Substance Substances matter that has a uniform and find composition; either an element or a compound. What approximately Molecules A iota is formed when cardinal or much atoms join to squeezeher chemically. A compound is a molecule that contains at least two antithetic elements. All compounds argon molecules, but not all molecules are compounds. Molecule Molecule an uncharged group of two or more atoms held together by covalent bonds particle Atom the smallest particle of a given casing of matter The rudiments of Chemistry All chemical compounds can be isolated based on chemical or physical properties. at a time separated, matter can be assort by its chemical or physical properties. bodily Properties forcible Properties characteristics of matter exhibited without a change of identity. physiological Properties They do not change identity What does this mean? When ice melts, does it become something else?

Examples of Physical Properties What are Physical Properties Solubility melt down straits change state point colour in denseness Electrical Conductivity Physical State (solid, liquid, gas) Melting aspire Melting Point the temperature of a solid when its crystal grillwork gate dis integrates. Melting Points Sand (silicon d! ioxide, or Quartz): 1723 C brininess (NaCl): 801 C Sugar (glucose and dextrose have the same break up points): 146 C Copper: 1083.4 C change state Point Boiling Point the temperature of a liquid when its vapor imperativeness equals the pressure exerted on its surface Boiling Points Alcohol - ethyl (grain) = 79 C Ammonia = -35.5 C Water = 100 C Density Density the amount of matter (mass) in a given unit volume Density What are...If you want to get a full essay, order it on our website: OrderCustomPaper.com

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