not known. Origin Of Name: From the Anglo-Saxon word lead; Latin, plumbum (the origin of the symbol Pb is the Latin word plumbum meaning liquid silver. Calculate the molecular weight of Lead or molecular weight Pb.Also see the full list of chemical elements and atomic weights.rom the Anglo-Saxon word lead; Latin, plumbum (the origin of the symbol Pb is the Latin word plumbum meaning liquid silver. Calculate the molecular weight of Lead or molecular weight Pb.
Homefacts City Report. Rex is located in Clayton County, GA. The population is NR. There are 3 public schools in Rex with an average Homefacts rating of B. The total crime rate for Rex is moderate, and there are 31 registered sex offenders residing in the city. Unemployment in Rex is very high and the median home sales price is $80,000.
Effingham County is a county located in the U.S. state of Georgia. As of the 2010 census, the population was 52,250. The seat is Springfield. Effingham County is included in the Savannah, GA Metropolitan Statistical Area. In 2008, Effingham County was ranked as the sixth fastest-growing midsize county in the nation from 2000 to 2007 by the U.S. Census Bureau. The county had a 35.1% growth rate over that period.