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The Scientific Method

by: Mamragbe Diaby

The Scientific Method Chem 100

Marketplace > Montclair State University > Chem 100 > The Scientific Method
Mamragbe Diaby

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The Scientific Method
Introduction to chemistry
Professor Bandy
Class Notes
25 ?




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This 2 page Class Notes was uploaded by Mamragbe Diaby on Monday September 19, 2016. The Class Notes belongs to Chem 100 at Montclair State University taught by Professor Bandy in Fall 2016. Since its upload, it has received 6 views.


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Date Created: 09/19/16
Chemistry 9/14/2016 The Scientific Method The steps: 1. Question/ Observation 2. Hypothesis­ tentative explanation 3. Experiment 4. Data/ Results 5. Publish the data ● Hypothesis­ tentative model, to be tested by experiments ● Experiment ● Theory­ based on more than one law ● John Dalton’s formulation of atomic theory is an application of scientific method.  All matter is  composed of small particles called atoms First Wanderers (600 B.C) ● Plato:  Reason alone, superior way to unravel the mysteries of nature ● Thales:  Substances can converted from one form to another, in reality one basic substance Democritus:  Matter is composed of atoms ● Father of the Atomic Theory ○ Atomas­ Greek word for atoms ■ Smallest indivisible particle in matter ● “I prefer discovering a new law of Physics than becoming the Great King of Persia!” Alchemy or Alchemist ● Goal:  Transmutation of base metals into gold and discovery of the “elixir of life” ● Metallurgy ● Alloy­ ● Mysticism and secrecy slowed any real scientific progress Differences/similarities ● Alchemy: ○ Little prior knowledge ○ Surrounded by secrecy ○ Work based on and towards a belief ● Modern Science ○ Standing on shoulders of giants ○ scientist s are transparent and published ○ Open ended research An understanding ● The scientific revolution­ 1543 Classification by Phase: ● Matter ○ Solid ■ Incompressible ■ Fixed Volume ■ Fixed Shape ○ Liquid ■ Incompressible ■ Fixed Volume ■ Variable Shape ○ Gas ■ Compressible ■ Variable Volume ■ Variable Shape ● Pure substances­ Same throughout matter, element cannot be decomposed to simpler forms by  any amount of chemical transformation ○ Element­  ■ Ex:  Copper ○ Compound­  ■ Ex:  Sugar ● Mixtures­ Combinations of different element that can be separated ○ Homogeneous­ Difficult to separate ■ Ex:  Soft Drink ○ Heterogeneous­ Easy to separate ■ Ex:  Oil and Water ● Physical properties:  Those properties that a substance displays without changing its  composition. ● Chemical properties:  Those properties that a substance displays only changing its composition


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