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.
Cumming is a city in Forsyth County, Georgia, United States. The population was 5,430 at the 2010 census. However, places with a Cumming mailing address have a population of around 100,000. The city is the county seat of Forsyth County. The area now called Cumming is located west of Hall County around the area of Vann's Crossing. The area, now called Cumming, was first inhabited by Cherokee tribes. They came in 1755, the Cherokee and Creek people developed disputes over hunting land.