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.
Internal Medicine encompasses the care of all adults, healthy and sick. Internists (as all doctors who complete an internal medicine residency are called) can be generalists or subspecialists, like cardiologists or rheumatologists.