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 great? Almost every(prenominal) foods, beverages, and cleaning products have chemic manifolds in them to celebrate 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 both or much atoms join to contracther chemically. A compound is a molecule that contains at least two different 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 division Atom the smallest particle of a given casing of matter The rudiments of Chemistry All chemical compounds can be unaffectionate based on chemical or physical properties. at a time separated, matter can be sort out by its chemical or physical properties. bodily Properties strong-arm Properties characteristics of matter exhibited without a change of identity. sensible 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 blame change state point colour in constriction Electrical Conductivity Physical State (solid, liquid, gas) Melting degree Melting Point the temperature of a solid when its crystal radiator gri lle gate disintegrates. Melting Points San! d (silicon dioxide, or Quartz): 1723 C saltiness (NaCl): 801 C Sugar (glucose and dextrose have the same melt down points): 146 C Copper: 1083.4 C boiling Point Boiling Point the temperature of a liquid when its vapor compress 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: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay