Work Step by Step
The attraction of liquid oxygen droplets to the poles tells us that liquid oxygen is paramagnetic. As explained on page 942 and section 27.7, a material with atomic magnetic dipoles is pulled toward the poles of a magnet. Liquid nitrogen is diamagnetic. The reason that oxygen gas isn’t attracted to magnets is that paramagnetic susceptibility decreases rapidly with temperature (equation 28.32), and the attractive force becomes negligibly small at room temperature.