Nonmetals are located on the right side of the periodic table and are typically dull, poor conductors.

• A. Located on the left side
• B. Are good conductors
• C. Are located on the right side and are dull, poor conductors
• D. Are found along the stair-step line

Answer: (C)

Elements are grouped on the periodic table by properties, so nonmetals are mainly on the right side and typically appear dull and poor conductors of heat and electricity. The statement that combines both where nonmetals are located and how they behave—being on the right and being dull, poor conductors—is the most accurate description. In contrast, left-side elements are usually metals, which are shiny and good conductors, so describing nonmetals as good conductors wouldn’t fit. The stair-step line marks metalloids with mixed properties, not the general traits of nonmetals, so that option doesn’t capture the typical nonmetal characteristics.