In Mendeleev's 1871 periodic table, copper, silver, and gold are outlined twice, once under team VIII (Along with the iron triad and platinum team metals), and after under team IB. Team IB was nonetheless parenthesised to notice that it was tentative. Mendeleev's key criterion for group assignment was the utmost https://bigbos777-situs-slot56677.ssnblog.com/34827028/top-guidelines-of-bigbos777-daftar