A paragraph in my text reads:
An atom or ion with all electrons paired is not attracted by strong magnets and is termed 'diamagnetic'. In contrast, spins do not cancel when unpaired electrons are present. An atom or ion with unpaired electrons is attracted to strong magnets and is termed 'paramagnetic'.
That paragraph seems to state that diamagnetic things are, for most intents, non-magnetic things. Whereas, the following paragraph from the Wikipedia article on diamagnetism seems to state that diamagnetic things are, for all intents, magnetic things.
Diamagnetic materials create an induced magnetic field in a direction opposite to an externally applied magnetic field, and are repelled by the applied magnetic field.
What are diamagnets? How do they relate to paramagnets?