Q. Which of the following statements about non-metals is correct?
Answer: They are gases at room temperature
Notes: Most non-metals are poor conductors of heat and electricity, and they are not malleable or ductile. Many non-metals, such as oxygen, nitrogen, and chlorine, exist as gases at room temperature. The only exception is carbon (diamond/graphite) for conductivity, but in general, non-metals are gases at room temperature.