Multiple choice

Which of the following are diamagnetic?

  1. Be2
  2. B2
  3. C2
  4. O2
  5. F2 Select correct answer using codes given below:

  1. 1, 2 and 4

  2. 1, 3 and 5

  3. 2, 3 and 4

  4. 3 and 5

  5. 3, 4 and 5
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Be2 (8 e-) : σ1s2 ϭ*1s2 ϭ2s2 ϭ*2s2 No unpaired electron, diamagnetic.

B2 (10 e-) : σ1s2 ϭ*1s2 ϭ2s2 ϭ*2s2 ϭ2pz2 No unpaired electron, diamagnetic.

O2 (16 e-) : ϭ1s2 ϭ*1s2 ϭ2s2 ϭ*2s2 ϭ2pz2 π2px2 π2py2 ϭ*2pz2 No unpaired electron, diamagnetic.

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