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.
Test required: Postal Exam 473 / 473E. The Rural Carrier Associate (RCA) job is a non-career long-term relief position. RCAâs cover for full-time career Rural Carriers when the full-timer is out due to sick leave, vacation leave, days off, etc.