Radioactive iodine uptake testing is a useful diagnostic tool for assessing thyroid pathologies. The atom is the smallest unit of an element. An atom consists of electrons, protons and neutrons. Electrons revolve around the nucleus (made of protons and neutrons) in fixed orbits. The number of electrons equals number of protons in a neutral atom.
WHATâS NEW: 1  The Buffalo Bill Museum has been named one of the 25 best things to do in Iowa by VacationIdea Dream Vacation Magazine. 2  The Buffalo Bill Museum and LeClaire, Iowa are listed on the National Geographic website that helps people explore the Mississippi River.
William F. 'Buffalo Bill' Cody was born just west of the Mississippi River near LeClaire, Iowa, on February 26, 1846. Learn more about the American West. William F. 'Buffalo Bill' Cody was born just west of the Mississippi River near LeClaire, Iowa, on February 26, 1846.