Tennessee Historical Commission marker at the north end of McSween Memorial Bridge (US-321) in Newport, Tennessee. The sign recalls the location of War Ford, 0.2 miles to the east along the Pigeon River. The ford was an important crossing along the Great Indian Warpath.
Definition: a substance in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating three-dimensional pattern. Most crystals are solids.
Chemistry, from the ancient Egyptian word khÄmia meaning transmutation of earth, is the science of matter at the atomic to molecular scale, dealing primarily with collections of atoms, such as molecules, crystals, and metals.