Question

The bond order of HeH⁺ is:

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

Tip about bond order and molecular orbital theory In molecular orbital theory, remember that the bond order helps predict the stability and bonding characteristics of a molecule. If the number of bonding electrons exceeds anti-bonding electrons, a stable bond is formed.

Answer 1

The Correct Option is A

The bond order of a molecule is calculated using the formula: \[\text{Bond Order} = \frac{1}{2} \left( \text{(number of bonding electrons)} - \text{(number of anti-bonding electrons)} \right)\] For \(HeH^{+}\), the electronic configuration is: \[HeH^+ \text{ has 2 electrons in the bonding molecular orbital and 1 electron in the anti-bonding molecular orbital.}\] This gives a bond order of: \[\text{Bond Order} = \frac{1}{2} (2 - 1) = 1\]
The bond order of \(HeH^{+}\) is therefore 1.