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.
USPS RCA Interview. I applied online. I interviewed at US Postal Service (Lodi, CA) in April 2014. Before I got an interview, I had to go take an exam for the USPS and I scored 80. You have to score atleast 70 to be considered a candidate. A week or two later, I got a phone call that I missed one evening, called them back first thing the next morning because the post master was gone for the day.