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.
General internal medicine physicians, or internists, are primary-care doctors who perform physical exams and treat a wide spectrum of common illnesses in adult men and women. One of every four physicians in the U.S. is an internist, many of whom are certified in one of 19 subspecialties, including cardiology, infectious disease and medical oncology.