Which of the following molecule doesn’t exist?(a) O2(b) H2(c) He2(d) N2I have been asked this question in exam.The doubt is from Bonding in Some Homonuclear Diatomic Molecules in section Chemical Bonding and Molecular Structure of Chemistry – Class 11

Which of the following molecule doesn’t exist?(a) O2(b) H2(c) He2(d)

1.	Which of the following molecule doesn’t exist?(a) O2(b) H2(c) He2(d) N2I have been asked this question in exam.The doubt is from Bonding in Some Homonuclear Diatomic Molecules in section Chemical Bonding and Molecular Structure of Chemistry – Class 11
Answer» Correct OPTION is (B) H2 Explanation: The electronic configuration of HE2 is σ1s^2σ*1s^2. Here NA = NB (where NA as the number of anti-bonding molecular orbitals and NB as the number of bonding molecular orbitals). So the molecule He2 doesn’t exist.

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