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Which of the following molecules has a bond order of 1?

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Question: Which of the following molecules has a bond order of 1?

Options:

  1. H2
  2. He2
  3. Li2
  4. B2

Correct Answer: Li2

Solution: 

Li2 has a bond order of 1, calculated as (2 bonding electrons - 0 antibonding electrons)/2 = 1.

Which of the following molecules has a bond order of 1?

Practice Questions

Q1
Which of the following molecules has a bond order of 1?
  1. H2
  2. He2
  3. Li2
  4. B2

Questions & Step-by-Step Solutions

Which of the following molecules has a bond order of 1?
Correct Answer: Li2
  • Step 1: Understand what bond order means. Bond order is a way to measure the strength and stability of a bond between two atoms.
  • Step 2: Know the formula for calculating bond order: (Number of bonding electrons - Number of antibonding electrons) / 2.
  • Step 3: Identify the molecule in question, which is Li2 (Lithium molecule).
  • Step 4: Determine the number of bonding electrons in Li2. For Li2, there are 2 bonding electrons.
  • Step 5: Determine the number of antibonding electrons in Li2. For Li2, there are 0 antibonding electrons.
  • Step 6: Plug the numbers into the bond order formula: (2 bonding electrons - 0 antibonding electrons) / 2.
  • Step 7: Calculate the bond order: (2 - 0) / 2 = 2 / 2 = 1.
  • Step 8: Conclude that Li2 has a bond order of 1.
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