Unpaired electrons are electrons in an atom or molecule that are not paired with another electron of opposite spin. They are important because they can affect the chemical properties of a substance. For example, substances with unpaired electrons are often more reactive than those without unpaired electrons.
There are a few ways to tell if there are three unpaired electrons in a substance. One way is to look at the electron configuration of the substance. The electron configuration tells you how the electrons are arranged in the atom or molecule. If there are three unpaired electrons, then the electron configuration will have three unpaired electrons in the outermost shell.
