
To find:
if removing an electron will create molecular ions (He2+ and Ne2+) more stable than He2 and Ne2.

Answer to Problem 5.98QA
Solution:
a) Bond order of He2+ = 0.5
b) Bond order of Ne2+ = 0.5
All species with nonzero bond order may exist. Therefore removing of and electron create He2+ and Ne2+ and are more stable than He2 and Ne2.
Explanation of Solution
Molecular orbital diagrams of He2, He2+, Ne2 and Ne2+ are shown below:
A) Comparison of He2 and He2+:
Bond order of He2:
Electronic configuration of He2+ is,
Bond order of He2+:
Electronic configuration of He2+ is,
B) Comparison of Ne2 and Ne2+:
Electronic configuration of Ne2 is,
Electronic configuration of Ne2+ is,
All species with nonzero bond order may exist, therefore, He2+, Ne2+ may exist and are more stable than He2 and Ne2. The strength of bond and stability of the molecule increase as the bond order increases.
Conclusion:
We used molecular orbital diagram to find the bond order and the stability of the compound.
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Chapter 5 Solutions
Chemistry: An Atoms-Focused Approach
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