non-metal

This term describes elements that occupy the right side of the periodic table, characterized by their inability to conduct electricity or heat efficiently. They typically form acidic oxides and are brittle in their solid state, contrasting sharply with the ductility of metals. As a noun, it follows standard English countability rules. While it can refer to the general category of elements, it is most frequently used in the countable sense when referring to a specific element that fits this classification.