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Chem 42, Week 1 Notes

by: Ariana Notetaker

Chem 42, Week 1 Notes Chem 42

Marketplace > Santa Rosa Junior College > Science > Chem 42 > Chem 42 Week 1 Notes
Ariana Notetaker
Santa Rosa Junior College
GPA 4.0
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About this Document

These notes cover the basic chemistry ideas
Introduction to Chemistry
Class Notes
pure substances, Mixtures, homogenous mixture, statesofmatter, transformationsofmatter, physical property, chemicalproperty, physicalchange, chemicalchange, atomictheory, Dalton's Atomic Theory, atoms, rutherford, baseunits, Metric Prefixes




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This 3 page Class Notes was uploaded by Ariana Notetaker on Friday September 30, 2016. The Class Notes belongs to Chem 42 at Santa Rosa Junior College taught by Fassler in Fall 2016. Since its upload, it has received 8 views. For similar materials see Introduction to Chemistry in Science at Santa Rosa Junior College.

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Date Created: 09/30/16
Intro to Chemistry Chemistry The study of matter and its transformations Matter Anything that takes up space Pure Substances -Only one type of matter -Always have the same composition -Can only be separated by chemical means (Elements and compounds) Mixtures -Several types of matter -Can have variable composition -Can be separated by physical means (Homogeneous and Heterogeneous) States of Matter Solid Liquid Gas -has volume and shape -has volume but no shape -has the shape and volume of the container Transformations of matter Physical change -matter changes only its behavior -Same substance, different state Chemical change -matter rearranges from one compound to another Atomic Theory (1808 - Dalton) Observations: mass is conserved in reactions -compounds have fixed compositions Dalton’s Theory 1. Matter is made of atoms 2. Atoms cannot be made or destroyed 3. Atoms of a particular element are identical -Atoms of different elements are different 4. In a chemical reaction, the atoms are rearranged What is the Atom made of? Rutherford Atoms contain electrons -negatively charged particles - - beta particle - - - Atom gold foil - electrons can be removed - - -positive charge is diffused and can’t be removed Measurements and the metric system Measurements and the metric system Base Units (SI) Mass —> kilogram (Kg) = 2.205 lbs Length —> Meters (m) = 39.37 inches Time —> seconds (s) Temperature —> kelvins (k) Derived Units Volume -> (Liters or m ) 1m = 1000 L —> milliliters (mL) Energy (J) Density = mass/volume (g/mL)


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