First slide

Covalent Bonding

Question

How would N-N bond distance or O-O bond distance change when N₂ changes to $N_{2}^{+} and O_{2} changes to O_{2}^{+} ?$

Moderate

A

increase, decrease
B

decrease, increase
C

increases in both the cases
D

decreases in both the cases

Solution

When $N_{2}^{+}$ is formed from N₂, the electron is lost from the bonding molecular orbital and thus the bond order decreases. Consequently, the bond distance increases. When $O_{2}^{+}$ is formed, the electron is lost from an antibonding molecular orbital. Obviously, the bond order increases and the bond distance decreases.

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