In Mendeleev's 1871 periodic desk, copper, silver, and gold are mentioned twice, once under team VIII (with the iron triad and platinum group metals), and the moment less than group IB. Team IB was However parenthesised to note that it absolutely was tentative. Mendeleev's primary criterion for team assignment was https://cashvpjbt.educationalimpactblog.com/57431791/considerations-to-know-about-bigbos777-link