nonmetal
This term identifies elements that occupy the right side of the periodic table, characterized by their inability to conduct electricity or heat efficiently. It carries a technical, scientific connotation used primarily in chemistry and materials science to categorize substances by their physical and chemical properties. As a noun, the word follows standard English countability rules, though it is frequently used in the plural form when discussing groups of elements. There are no irregular pluralizations or specialized partitive counters required for its usage.
Meanings
An element that lacks the characteristic properties of metals, such as high electrical conductivity, luster, and malleability.
"The periodic table contains several nonmetals, including oxygen and nitrogen."