True or False: Insulators typically contain seven or eight valence electrons.

The statement is true because insulators, which are materials that do not conduct electricity well, generally have a full outer electron shell with eight valence electrons. In the case of many insulators, such as non-metals or certain semiconductors, they are characterized by having a complete octet. This full outer shell configuration makes it difficult for electrons to move freely, which is why these materials resist the flow of electric current.

In contrast, conductive materials usually have fewer valence electrons in their outer shells, allowing for increased electron mobility and conductivity. Therefore, insulators typically falling into the category of having seven or eight valence electrons reinforces their role as non-conductive materials in electrical applications.