How would you define a nonmetal?

A nonmetal is best defined as a poor conductor of heat and electricity. This characteristic sets nonmetals apart from metals, which are generally good conductors. Nonmetals tend to have higher electronegativities, which means they do not easily lose electrons to form bonds and are less effective at transmitting thermal and electrical energy.

Nonmetals also often exist in various states at room temperature, including gases like oxygen and nitrogen, as well as solids like sulfur and phosphorus. Their lack of metallic luster and malleability also contribute to their classification as nonmetals.

In contrast, being a good conductor of heat and electricity, having fixed properties, or being a reactive metal does not align with the defining characteristics of nonmetals. Therefore, defining a nonmetal as a poor conductor highlights a fundamental aspect of their nature and helps foster a clearer understanding of the differences between metals and nonmetals.