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.
Candidates for postal carriers, mail processing clerks and postal clerks will need to score well on the Postal 473 exam to find a local post office job. Preparation for the Postal 473 Exam consists of understanding what is on the exam, how it is scored, and practicing with free postal exam questions.