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University of Memphis - CHEM 1110 - 1.2-1.4 Notes - Class Notes

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School: University of Memphis
Department: Chemistry
Course: General Chemistry I Lecture
Professor: Henry Kurtz
Term: Fall 2018
Tags:
Name: 1.2-1.4 Notes
Description: Covers 1.2-1.4 in textbook
Uploaded: 09/19/2018
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School: University of Memphis
Department: Chemistry
Course: General Chemistry I Lecture
Professor: Henry Kurtz
Term: Fall 2018
Tags:
Name: 1.2-1.4 Notes
Description: Covers 1.2-1.4 in textbook
Uploaded: 09/19/2018

Unformatted text preview: 1.3 The Scientific Approach to knowledge learly influential thinkers rejected it. excepled over the last 400 uears learn linkers were influenced by Plato - scientific approach through reality (reasoning & the empirical & based on observation & experiment some are qualitative noting or describing how a process happens many are quantitative - measuring or quantifying something about the process Antonie Lavoisier - made the observation mass doesn't change in an object or explanation of observation Observations lead to hypothesis- tentative interpretati by further observations good hupothesis = falsifiable - can be confirmed Scientist test hypothesis by experiments ~ the result mou support it or prove it wrong Scientific Law. brief Statement that Summarizes past observations & predicts future ones - always observed to be true scientific Theory- model for the way nature is a tries to explain why of Dalton's atomic theory. John Dalton - particulalc view of motier grows out are rearranged (not created maller is composed of atoms (industructible), theu mass remains. or destroyed) the total1.4. Early Ideas & Building Blocks of Matter -Leucippus & his student Democritus were the people to propose that matter is composed of small indestructible particles D - "The 1st principles of the Universe are atoms & empty space: everything else is merely thought to exist. continuous ho smallest parts since there was no way to test it, aristotle's view prevailed | 2000 uears 16 centr - modern science Nicolaus Copernicus - On the Revolution of the Heavenly Orbs - sun was the center of the universe - marks the beginning of scientific revolution 200 years : , Johannes hepler, Galileo, Rob Boyle, Isaac Newton John DaltonStudy Guide 1. Latoms are the smallest pieces of moher particles (protons & electrons, make up atoms. atoms aroup together to become molecules Inolecules are the smallest pieces of compound pure Substance is made of l type of particle ex. 02 porticle 88 pure substance con form an element ex. He, H or compound ex. H20-2H. 10 compoung is two or more elements but are in fixed definite proportions mixture is composed of two or more particles in proportions that con varsin different samples noitin - helexo: not uniform throughout - composition 107 one du pe of varies from one region. To another'ex.cocktail particle Imixture:composed of two or more particles in proportions that can vary from one! Sample to the next 2 porticles homo: same composition throughly Mix 1.3 scientific method not set in stone! theory: explanation for observations & laws what based on hypothesis provide explanation Law Statement or equation that summarizes predicts results past observations & predicts future ones of certain ing! repist change, but revise them WS {Antonie Lavoisien - observed mass doesnt change in an object. "Father of Chemistry Studied combustion