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.
To get a local post office job, you must pass a postal exam. Preparation for the Postal 460 Exam consists of understanding what is on the exam, how it is scored, and answering as many free postal exam questions as you can. The Postal 460 Exam is very similar to the Postal 473 exam.