Limited time offer 20% OFF StudySoup Subscription details

MSU - CEM 141 - Study Guide - Midterm

Created by: Leah DiCiesare Elite Notetaker

> > > > MSU - CEM 141 - Study Guide - Midterm

MSU - CEM 141 - Study Guide - Midterm

School: Michigan State University
Department: Chemistry
Course: General Chemistry
Professor: Jian Hu
Term: Fall 2016
Tags: atoms, interactions, London dispersion forces, and Covalent Bond
Name: CEM 141, Exam 1 Study Guide
Description: This is a study guide for the first exam. I went through the mock exam on D2L and using that as a guide put all the big ideas and their important details into this study guide.
Uploaded: 09/28/2016
0 5 3 4 Reviews
This preview shows pages 1 - 2 of a 5 page document. to view the rest of the content
background image Study Guide Atoms and Atom Interactions Atoms are the smallest particle of an element Molecules are made up of at least two atoms Compounds are made up at least two elements Dalton’s Atomic Theory: 1. Elements are composed of small, indivisible, indestructible particles called atoms 2. All atoms of an element are identical and have the same mass and properties 3. Atoms of a given element are different from atoms of other elements 4. Compounds are formed by combinations of atoms of two or more elements 5. Chemical reactions are due to the rearrangements of atoms, atoms (matter) are neither created nor destroyed during a chemical reaction Thomson’s Experiment: discovered electrons o Used a Cathode Ray Tube o Experiment showed:  "particles" emerged from one disc (the cathode) an moved to the other side
(anode)
 these particles could be deflected by electrical fields in a direction that 
indicated it was (­) charge 
Deflected by magnetic field Particles carried electrical charge The metal that the cathode was made of did not affect the behavior of the 
ray, it appeared to be independent of the element it came from
Particle must be a common component for all atoms o Thomson's Plum Pudding Atom Model Atoms contain electrons "embedded" in the positively charge background 
within the atom
Ernest Rutherford (1906)
background image Study Guide o Used alpha particles (2 protons and 2 neutrons, positive charged; nucleus of 
Helium atom) and shot them at a thin piece of metal. Some of the particles were 
deflected, but most went right through.
o Small, dense, positive nucleus in the center of the atom; atom was mostly empty 
space
o Planetary Model: electrons on orbits around nucleus The Neutron is neutral in charge and is in the nucleus. Potential energy: energy associated with the position of a system of objects in a field o Can't have without a field o Need 2 or more objects o Potential energy cannot be associated with a single object; it must be associated  with the field in which the interaction is taking place London Dispersion Force
o
Instantaneous uneven distribution of the atom caused by fluctuations of electron 
cloud in molecule or atom
o
Electrons of 2nd atom are attracted to 1st atom, so a 2nd dipole is induced
o
An attractive force that is present between all molecules or atoms (neutral species) Energy of Interactions o Total energy: no change overtime because it is an isolated system, no exchange 
with surroundings
o Kinetic energy: increases first, then decreases

This is the end of the preview. Please to view the rest of the content
Join more than 18,000+ college students at Michigan State University who use StudySoup to get ahead
5 Pages 62 Views 49 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
Join more than 18,000+ college students at Michigan State University who use StudySoup to get ahead
School: Michigan State University
Department: Chemistry
Course: General Chemistry
Professor: Jian Hu
Term: Fall 2016
Tags: atoms, interactions, London dispersion forces, and Covalent Bond
Name: CEM 141, Exam 1 Study Guide
Description: This is a study guide for the first exam. I went through the mock exam on D2L and using that as a guide put all the big ideas and their important details into this study guide.
Uploaded: 09/28/2016
5 Pages 62 Views 49 Unlocks
  • Better Grades Guarantee
  • 24/7 Homework help
  • Notes, Study Guides, Flashcards + More!
Join StudySoup for FREE
Get Full Access to MSU - CEM 141 - Study Guide - Midterm
Join with Email
Already have an account? Login here
×
Log in to StudySoup
Get Full Access to MSU - CEM 141 - Study Guide - Midterm

Forgot password? Reset password here

Reset your password

I don't want to reset my password

Need help? Contact support

Need an Account? Is not associated with an account
Sign up
We're here to help

Having trouble accessing your account? Let us help you, contact support at +1(510) 944-1054 or support@studysoup.com

Got it, thanks!
Password Reset Request Sent An email has been sent to the email address associated to your account. Follow the link in the email to reset your password. If you're having trouble finding our email please check your spam folder
Got it, thanks!
Already have an Account? Is already in use
Log in
Incorrect Password The password used to log in with this account is incorrect
Try Again

Forgot password? Reset it here