11. Bonding & Molecular Structure

Lewis Dot Structures: Sigma & Pi Bonds

Multiple Choice
In Lewis dot structures, when are multiple bonds (double or triple bonds) required between atoms?
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Open Question
The carbon-carbon bond in C₂H₂ contains ________ σ and ________ π bonds.
Multiple Choice
In a triple bond between two atoms, how many electrons are shared?
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Multiple Choice
How many sigma and pi bonds are present in the molecule C2H4 (ethene)?
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Multiple Choice
Which of the following best describes how to calculate the heat of reaction (ΔH) using bond energies and Lewis structures?
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Multiple Choice
Draw the total number of sigma and pi bonds of the sulfur trioxide molecule, SO₃.
Multiple Choice
In a Lewis dot structure, what does a single stick or line drawn between two atoms represent?
Multiple Choice
Which of the following molecules has a double bond?
Multiple Choice
In Lewis dot structures, when is it appropriate to form double or triple bonds between atoms?
Open Question
Draw the Lewis structure for the molecule CH₂CHCH₃. How many sigma and pi bonds does it contain?
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Multiple Choice
In the Lewis structure of carbon dioxide (CO_2), which atomic orbitals overlap to form the sigma and pi bonds between carbon and oxygen atoms?
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Multiple Choice
In a Lewis dot structure of ethene (C_2H_4), which arrows would point to electrons involved in a pi bond?
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Open Question
How many 𝜎 and 𝜋 bonds are in this molecule?
Open Question
Which of the two compounds, H₂NNH₂ and HNNH, has the strongest nitrogen-nitrogen bond, and which has the shorter nitrogen-nitrogen bond?
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Multiple Choice
How many pi bonds are present in the molecule C₄H₆O?