Ch. 1 - A Review of General ChemistryWorksheetSee all chapters
All Chapters
Ch. 1 - A Review of General Chemistry
Ch. 2 - Molecular Representations
Ch. 3 - Acids and Bases
Ch. 4 - Alkanes and Cycloalkanes
Ch. 5 - Chirality
Ch. 6 - Thermodynamics and Kinetics
Ch. 7 - Substitution Reactions
Ch. 8 - Elimination Reactions
Ch. 9 - Alkenes and Alkynes
Ch. 10 - Addition Reactions
Ch. 11 - Radical Reactions
Ch. 12 - Alcohols, Ethers, Epoxides and Thiols
Ch. 13 - Alcohols and Carbonyl Compounds
Ch. 14 - Synthetic Techniques
Ch. 15 - Analytical Techniques: IR, NMR, Mass Spect
Ch. 16 - Conjugated Systems
Ch. 17 - Aromaticity
Ch. 18 - Reactions of Aromatics: EAS and Beyond
Ch. 19 - Aldehydes and Ketones: Nucleophilic Addition
Ch. 20 - Carboxylic Acid Derivatives: NAS
Ch. 21 - Enolate Chemistry: Reactions at the Alpha-Carbon
Ch. 22 - Condensation Chemistry
Ch. 23 - Amines
Ch. 24 - Carbohydrates
Ch. 25 - Phenols
Ch. 26 - Amino Acids, Peptides, and Proteins
Bond Properties Summary

There’s some simple facts about different types of bonds that could show up on your exam. Here’s a really nice summary for you: 

Concept #1: Single bonds, double bonds, and triple bonds.

A single bond is made out of a single sigma (σ)-bond; add π-bonds to make double and triple bonds. 

Counting Total Sigma and Pi Bonds

This kind of question shows up on exams often, and it’s an easy one to get right. How many sigma and pi bonds are there in the following molecules?

Example #1: Determine the number of σ-bonds and π-bonds in the following molecule.

Example #2: Determine the number of σ-bonds and π-bonds in the following molecule.

Rank the following bonds from shortest to longest:

 

Practice: Rank the following bonds from shortest to longest

Now you should be a pro at bond lengths and bond strengths. Let’s move on to the next topic.

Additional Problems
Each of the following molecules has a carbon-nitrogen bond. Rank those bonds from shortest to longest. CH3CONH2         CH 3CN          CH 3NH2
Count the total number of σ bonds and π bonds in the compound below: 
Consider the three compounds shown below and then answer the questions that follow:  (c) Identify the compound with the greatest number of σ bonds.
Consider the three compounds shown below and then answer the questions that follow:  (e) Which compound contains more than one π bond?
What is the  total number of pi (π) bonds  present within the structure of  C2H2? A. 0 B. 1 C. 2 D. 3
 Indicate the compound that has the shortest bond length between the two middle carbon atoms.
Which of the following indicated C—C bond is the  shortest?
Rank the following C-H bonds from strongest to weakest. Csp2 - H          C sp - H          C sp3 - H
Which of the following indicated C-C bonds is (are) the shortest? (a) I(b) II(c) III(d) both I & II
How many σ and π bonds are in this molecule?
How many pi bonds are in the following structure? 
What bond in the following molecule is the shortest? 
Compare the C-to-C bond length and strength for the following compounds.a. The shortest and strongest bond is found in compound IIb. The shortest and weakest bond is found in compound Ic. The shortest and strongest bond is found in compound Id. The shortest and weakest bond is found in compound II e. The bonds are of identical length and strength 
The formulas for ethane, ethene, and ethyne are C2H6, C2H4, and C2H2 respectively. Rank these compounds by the length of the carbon-carbon bond.
How many σ and π bonds are in this molecule?