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Which of the following has the lowest bond energy?

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Question: Which of the following has the lowest bond energy?

Options:

  1. N2
  2. O2
  3. F2
  4. Cl2

Correct Answer: F2

Solution: 

F2 has the lowest bond energy due to the repulsion between the lone pairs on the fluorine atoms.

Which of the following has the lowest bond energy?

Practice Questions

Q1
Which of the following has the lowest bond energy?
  1. N2
  2. O2
  3. F2
  4. Cl2

Questions & Step-by-Step Solutions

Which of the following has the lowest bond energy?
  • Step 1: Understand what bond energy means. Bond energy is the amount of energy needed to break a bond between two atoms.
  • Step 2: Identify the molecules being compared. In this case, we are looking at F2 (fluorine gas).
  • Step 3: Know that F2 consists of two fluorine atoms bonded together.
  • Step 4: Recognize that each fluorine atom has three lone pairs of electrons.
  • Step 5: Understand that these lone pairs can repel each other, which weakens the bond between the two fluorine atoms.
  • Step 6: Conclude that because of this repulsion, F2 has a lower bond energy compared to other molecules that do not have this issue.
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