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.
When you apply for these jobs, you will have to have to take a postal exam. This exam will test your knowledge in memorization, numbers and speed reading. By passing the postal exam, you can secure yourself in a career with the United States Postal Service.