List of chemical symbols. Most chemical elements are represented symbolically by two letters, generally the first two in their name. In some cases, the first letter together with some other letter from their name was used, particularly when their first two letters had already been allocated to another element.
Patterson Township, Beaver County, Pennsylvania. Patterson Township is a township in Beaver County, Pennsylvania, United States. The population was 3,029 at the 2010 census.
Fredericktown, Pennsylvania. Fredericktown is a census-designated place located in East Bethlehem Township, Washington County in the state of Pennsylvania. The community was part of the Fredericktown-Millsboro CDP for the 2000 census, but was split into two separate CDPs for the 2010 census, the other community being Millsboro.