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.
Comprehensive practice post office exams are available in the new 6th edition of Post Office Jobs to prepare for the forms checking, address checking, memory and coding Parts A through C of the new exam. Several 473 Exam Sample Questions are available online at www.postalwork.net.