Which of the following species has the highest bond order?

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Q: Which of the following species has the highest bond order?

Solution: O2+ has a bond order of 2.5, which is higher than O2 (2), O2- (1.5), and O2 2- (1).

Steps: 9

Step 1: Understand what bond order means. Bond order is a measure of the number of chemical bonds between a pair of atoms. A higher bond order means a stronger bond.
Step 2: Identify the species we are comparing: O2+, O2, O2-, and O2 2-.
Step 3: Calculate the bond order for each species using the formula: Bond Order = (Number of bonding electrons - Number of antibonding electrons) / 2.
Step 4: For O2+: It has 10 bonding electrons and 2 antibonding electrons. So, Bond Order = (10 - 2) / 2 = 4 / 2 = 2.5.
Step 5: For O2: It has 10 bonding electrons and 6 antibonding electrons. So, Bond Order = (10 - 6) / 2 = 4 / 2 = 2.
Step 6: For O2-: It has 10 bonding electrons and 7 antibonding electrons. So, Bond Order = (10 - 7) / 2 = 3 / 2 = 1.5.
Step 7: For O2 2-: It has 10 bonding electrons and 8 antibonding electrons. So, Bond Order = (10 - 8) / 2 = 2 / 2 = 1.
Step 8: Compare the bond orders: O2+ has a bond order of 2.5, O2 has 2, O2- has 1.5, and O2 2- has 1.
Step 9: Conclude that O2+ has the highest bond order among the species listed.