Practice question
Question
Which molecule has all its electrons paired, making it diamagnetic?
Explanation
For F₂ : (sigma 1s)² (sigma^* 1s)² (sigma 2s)² (sigma^* 2s)² (sigma 2pz)² (pi 2px)² (pi 2py)² (pi^* 2px)² (pi^* 2py)² . All electrons are paired, so it’s diamagnetic.