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Texas A&M - CHEM 101 - Study Guide - Midterm

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Texas A&M - CHEM 101 - Study Guide - Midterm

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background image CHEM 101 – EXAM #1 STUDY GUIDE  Formulas   H = Planck’s Constant = 6.626  × 10 −34  𝐽  ·  𝑠   
(Speed of Light ) 𝑐 = 2.998  × 10
8      
 
 
 
 
   
 
 
 
 
Heisenberg Principle  Δ𝑥 ∗ Δ(𝑚𝑣) ≥   4𝜋       Schrödinger Equation  𝐻 ̂𝛹 = 𝐸𝛹     
 
 
 
 
 
 
 
 
 
 
 
 
 
Speed of Light  Equation  𝒄 =  𝝀𝝂  E = a single photon’s energy   h = 6.626  × 10 −34  𝐽  ·  𝑠                                       𝝂 = frequency 
C = speed of light  
λ = wavelength   𝝀     E = 𝒉𝝂 = 𝒉𝒄 𝝀   Wavelength of A Particle    𝝀 = 𝒉 𝒎𝒗   v = velocity 
m – mass of particle 
h – planck’s constant.  
E = -2.178 x 10 -18  J ( 𝑧 2 𝑛 2 N – energy level  Z – charge of nucleus (usually 1)   𝛥𝐸 = E f  – E 𝛥𝐸 =   −2.178 ∗ 10 −18 1 𝑛 𝑓 2 1 𝑛 𝑖 2 Is the same as   1
𝜆
= 𝑅 [ 1 𝑛 𝑓 2 1 𝑛 𝑖 2   𝑅 ℎ =  Rydberg   Constant = 1.094   * 10 -18  m -1      𝐸 𝑛 =   −𝑅 𝑛 𝑛 2       Energy of Specific “n” level. 
background image  
 
Concepts   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Physical Property  Method   Density   Centrifugation  Boiling Point  Distillation  State of Matter  Filtration  Intramolecular Forces   Chromatography  Vapor Pressure   Evaporation  Magnetism  Magnets   Solubility   Filtration   
 
 
 
 
 
 
 
 
  -  Carbon – 13  Can be written as        12                       OR      12       and is still the same element.            C           C                  6       
 
Ex. 21.16      21.1   These #s don’t change.  They’re certain. 
     21.15    
     21.17      .6, .7, .5 
 These #s do change.  They’re uncertain.  Rules for Counting Significant Figures  1.  Non-Zero Integers     Always      42.316   2.  Zeroes: (three types)   a.  Leading Zeroes     Never       0.0025   b.  Captive Zeroes     Always      1.008   c.  Trailing Zeroes     Decimal    1.00 x 10^6   3.  Exact Numbers      Infinite bc Exact.  1 in = 2.54 cm    Example : I have a pin that is 2.85 cm. How 
long is it in inches?  
 
1 in = 2.54 cm   
 Unit Factor     
2.85 cm x 
1 𝑖𝑛 2.54 𝑐𝑚  x  2.85  2.54  𝑖𝑛 = 1.12 in   Methane   1g Carbon   = 0.336 g H    
Ethane    
1 g Carbon   = 0.252g H   
** Any set of carbon/hydrogen molecules has a 
whole # ratio 
Dalton’s Atomic Theory  1.  Each element consists of tiny particles: Atoms. 
2.  All atoms of a same element are identical. 
Atoms of other elements are different.   3.  Chemical compounds form when different  elements combine.   4.  Chemical reactions reorganize atoms, not  change atoms themselves.  
background image  
 
 
 
 
 
 
  L #   Type of Orbital  # of Orbital  “s” – spherical   1 (2 atoms)  “p” – principal  3 (6 atoms)  “d”  5 (10 atoms)  “f”  7 (14 atoms)       
 
 
Electron Level (N & Type)  N + L  2s  2p  3s  3p  3d   
 
   
 
    Electron Configuration of Ions   -  Write an electron configuration of the neutral atom.   Then, remove or add electrons from the orbital with the HIGHEST N! 
 
 
 
L value  M 0,1  -1,0,1  0,1,2  -2,-1,0,1,2   4    0,1,2,3  -3,-2,-1,0,1,2,3 

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School: Texas A&M University
Department: Chemistry
Course: Fundamentals of Chemistry I
Professor: Gabbai
Term: Fall 2016
Tags: Chemistry
Name: CHEM 101 - Exam #1 Study Guide : Bethel
Description: Contains all definitions, example problems, and a review of important concepts!
Uploaded: 09/19/2016
8 Pages 58 Views 46 Unlocks
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