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Lesson: Sigma and Pi Bonding

In this lesson, we will learn how to describe the energies and electron densities of bonds formed by sigma and pi overlap of s, p, d, and f orbitals.

Worksheet • 12 Questions

Q1:

How many πœ‹ bonds are present in N 2 ?

Q2:

How many πœ‹ bonds are present in acetylene, C H 2 2 ?

Q3:

Which of the following statements is true?

  • AElectron density in a πœ‹ bond is concentrated in lobes on either side of the internuclear axis.
  • BA πœ‹ bonding orbital can contain more electrons than a 𝜎 bonding orbital.
  • CAtoms can be linked by only one πœ‹ bond.
  • DThe bond energy of a πœ‹ bond is usually greater than that of a 𝜎 bond.
  • EA 𝜎 bond is formed by lateral overlap of atomic orbitals.

Q4:

How many πœ‹ electrons are present in benzene?

Q5:

What kind of molecular orbital forms when the two atomic orbitals shown below interact in the manner indicated?

  • A πœ‹
  • B 𝜎 βˆ—
  • C πœ‹ βˆ—
  • D 𝜎

Q6:

What kind of molecular orbital forms when the two atomic orbitals shown below interact in the manner indicated?

  • A 𝜎
  • B 𝜎 βˆ—
  • C πœ‹
  • D πœ‹ βˆ—

Q7:

Which of the following diagrams correctly illustrates the phases and orientations of the atomic orbitals giving rise to a πœ‹ βˆ— orbital?

  • A
  • B
  • C
  • D
  • E

Q8:

Which of the following represents the bonding orbital overlap in C l 2 ?

  • A
  • B
  • C
  • D
  • E

Q9:

Which of the following represents the highest energy bonding orbital of O 2 ?

  • A
  • B
  • C
  • D
  • E

Q10:

Which of the following represents the orbital overlap in H C l ?

  • A
  • B
  • C
  • D
  • E

Q11:

Which of the following represents the orbital overlap in I C l ?

  • A
  • B
  • C
  • D
  • E

Q12:

Which of the following represents the highest energy bonding orbital of N 2 ?

  • A
  • B
  • C
  • D
  • E
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