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How many of the following species are diamagnetic? He ₂⁺, H ₂, H ₂⁺, H ₂⁻, He

Options

  1. A1
  2. B2
  3. C3
  4. D0

Correct answer

B. 2

Step-by-step solution

According to molecular orbital theory, species with all paired electrons in their electronic configuration are diamagnetic in nature. He ₂⁺ Has total 3 electrons, thus it contains one unpaired electron and is paramagnetic in nature. H ₂ Has total 2 electrons, thus it contains all paired electrons and is diamagnetic in nature. H ₂⁺ Has only l electron, thus it is paramagnetic in nature. H ₂⁻ Has total 3 electrons, thus it contains one unpaired electron and is paramagnetic in nature. He Contains total two (2) electro

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