Thallium (Tl) belongs to the Group 3 - Boron Family of elements. In the new IUPAC grouping, The Boron family is now Group 13.
Page updated 2/25/2016. Carrier, clerk, mail handlers, and distribution associates are required to take and pass the 473 Postal Exam. Other applicants including motor vehicle operators, mechanic, clerical, electronic technician, machinist, and trades must also pass a written test.
Postal Service Mail Carriers are responsible for picking up sorted mail and delivering it to the appropriate address. Carriers are given a specific location in which mail is delivered, known as their route. A high school diploma is needed to work as a carrier, with additional on-the-job testing and training required.