Summary:
- A nonmetal is an element that is generally a poor conductor of heat and electricity.
- Most properties of nonmetals are the opposite of metals.
- Nonmetals exist in all three states of matter.
- The majority are gases, such as nitrogen and oxygen.
- Bromine is a liquid.
- Liquid helium exists at an extremely low temperature and can be used to cool superconducting magnets for imaging studies.
- Inhaling helium changes the speed of sound, producing a higher pitch in your voice and can lead to physical harm and death.