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DU / Chemistry / CHEM 2451 / What is the aufbau principle?

What is the aufbau principle?

What is the aufbau principle?


School: University of Denver
Department: Chemistry
Course: Organic Chemistry I
Professor: Peter harrington
Term: Fall 2016
Tags: o-chem
Cost: 50
Name: O-Chem Exam 1 Study Guide
Description: This study guide is a question based review tool for the Exam 1 coming up this Wednesday. It covers all the material from lectures through 1/27.
Uploaded: 01/29/2016
5 Pages 131 Views 3 Unlocks

Organic Chemistry Harrington  

What is the aufbau principle?

Study Guide Exam 1 – Test Date February 3rd 

1) Explain the following concepts about atomic orbitals

a) Aufbau Principle

b) Pauli Exclusion Principle

c) Hund’s Rule

d) What orbitals correspond to each energy level/shell?

e) Be sure to know how to write electron configurations

2) What is electronegativity? What is its range?

3) What is the difference between ionic, polar covalent, and covalent bonds? What is the Δ in electronegativity for each bond? ΔEN is represented by δ+ or – in structures

4) Know how to draw Lewis Dot Structures – Review Guidelines in Notes Don’t forget formal charge = # of valence electrons – (nonbonding electrons  + ½ bonding electrons)

What is the pauli exclusion principle?

Practice by drawing dot structures for the following structures (answers on  next page) If you want to learn more check out What are the 3 economic goals?

PBr5 BCl3 HCN NH4+

Answers for #4

What orbitals correspond to each energy level/shell?

Don't forget about the age old question of What is huckel rule in chemistry?

5) Know how to draw a resonance structure. Practice by drawing the  resonance structure for CO2 (Review Guidelines)

6) What direction to arrows point in curved arrow notation? 7) Know how to draw hybrid orbital diagrams. Draw one for NH3

8) What is the general trend for atomic size in the periodic table? How does  this affect bond length?

9) Explain the differences between Molecular Orbital theory and Valence  Bond theory.

10) What is the general formula for alkanes?

11) What is the root name of alkanes with:

1 Carbon: 2 Carbons:

3 Carbons: 4 Carbons:

5 Carbons: 6 Carbons:

7 Carbons: 8 Carbons:

9 Carbons: 10 Carbons:

12) What are constitutional isomers? What are the constitutional isomers  for propane and butane?

13) What are the IUPAC System’s steps for naming alkanes? 1.  






7. (don’t forget sub-steps)

14) What is unique about cycloalkanes? What is their general formula (1  ring, 2 rings, 3 rings)?  

15) Describe the process for naming cycloalkanes. How do you number the  carbons? How do you know if the molecule is named as an alkane or a  cycloalkane?If you want to learn more check out How nuclear bombs work?

16) What saturates alkanes? Are cycloalkanes saturated or unsaturated?  17) Degree of unsaturation = ?

18) How do you classify carbons in an alkane or cycloalkane? What is the  degree of the hydrogen?

19) Describe the difference between intermolecular forces and  intramolecular forces.

20) What happens when a solid melts or a liquid boils? What happens to the entropy?

21) Describe the three types of intramolecular attractive forces. Rank them  strongest to weakest. Review how they help to predict boiling, melting point, and solubility.




22) How do you use Newman Projections to illustrate the rotation of C-C  bonds?

23) What angles are gauche and anti forms found at? What angles are  staggered? What angles are eclipsed? Which of those positions is higher in  energy?

24) Explain torsional and steric strain.

25) What are Lewis Acids and Lewis Bases?

26) What are Bronsted Acids and Bronsted Bases?

27) Keq = [ ] [ ] 

 [ ] [ ]

And Keq = [ ] [ ] at equilibrium  

 [ ]

28) What are conjugate bases and conjugate acids?

29) How do you find pKa? What constitutes a weak or strong acid? Don't forget about the age old question of Whose scheme was the watergate scandal?
Don't forget about the age old question of What are some psychological causes of erectile disorder?
We also discuss several other topics like How you will sanitize/clean your plant?

30) In curved arrow notation, how many are present in proton transfer  reactions? Substitution reactions? Why?

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