Non-metals are the elements in groups 14-16 of the periodic table. Non-metals are not able to conduct electricity or heat very well. As opposed to metals, non-metallic elements are very brittle. The non-metals can be gases, such as oxygen and solids, such as carbon.
internal medicine. The branch of medicine that deals with the diagnosis and treatment of diseases affecting the internal organs of the body, especially in adults.
Although internal medicine focuses on diagnosing and treating disease, injury or other conditions related to internal organs, the practice does the same for external body parts, also. Doctors who practice internal medicine can specialize in both organ health and external conditions.