Multiple choice

Which of the following are paramagnetic?

  1. Be2 2. B2 3. C2 4. O2 5. F2 Select correct answer.

  1. 1, 2, and 3 only

  2. 2 and 4 only

  3. 3 and 4 only

  4. 3 and 5 only

  5. 4 and 5 only
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

C2 (12 e-) : σ 1s2 ϭ*1s2 ϭ2s2 ϭ*2s2 ϭ2pz2 π2px1 π2py1 One unpaired electron, paramagnetic F2(18 e-) : ϭ1s2 σ*1s2 ϭ2s2 ϭ*2s2 ϭ2pz2 π2px2 π2py2 ϭ*2pz2 π*2px1 π*2py1 Two unpaired electrons, paramagnetic.

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