Which phrase best represents the typical properties of metalloids?

Metalloids are elements that possess a unique combination of properties between metals and nonmetals, making them quite distinctive on the periodic table. They typically display characteristics of both categories: for instance, they can conduct electricity like metals to some extent while also being brittle like nonmetals. This mixed behavior allows them to be utilized in various applications, especially in semiconductors, where their ability to conduct electricity can be manipulated based on conditions such as temperature and impurities.

In contrast, the other choices suggest limited characteristics that do not encompass the full range of metalloid behavior. Some suggest exclusive properties such as being only conductors, implying a lack of the insulating traits that some metalloids possess, or claim that metalloids are only found in gaseous states, which is inaccurate as they can also exist in solid forms. Thus, the phrase that best encapsulates the nature of metalloids is one that reflects this blend of metallic and nonmetallic properties.