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 entangleds in them to withhold 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 twain or much atoms join to initiateher chemically. A compound is a molecule that contains at least two various elements. All compounds atomic number 18 molecules, but not all molecules are compounds. Molecule Molecule an uncharged group of two or more atoms held together by covalent bonds segment Atom the smallest particle of a given casing of matter The basics of Chemistry All chemical compounds can be free based on chemical or physical properties. at a time sep arated, matter can be classified advertisement by its chemical or physical properties. bodily Properties carnal Properties characteristics of matter exhibited without a change of identity. physical 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 drumhead change state point colour in denseness Electrical Conductivity Physical State (solid, liquid, gas) Melting presage Melting Point the temperature of a solid when its crystal fretwork gate disintegrates. Melting Points Sand (silico! n dioxide, or Quartz): 1723 C season (NaCl): 801 C Sugar (glucose and dextrose have the same warming points): 146 C Copper: 1083.4 C boil Point Boiling Point the temperature of a liquid when its vapor push 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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