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.
An internist, also called a general internist or doctor of internal medicine, is a medical doctor that specializes in the diagnosis and medical (nonsurgical) treatment of adults. Internists provide long-term, comprehensive care and manage both common and complex diseases.