THE BIGBOS777 LINK SLOT DIARIES

In Mendeleev's 1871 periodic table, copper, silver, and gold are shown 2 times, once under group VIII (Together with the iron triad and platinum group metals), and once under group IB. Group IB was Even so parenthesised to note that it had been tentative. Mendeleev's primary criterion for group assignment was the utmost oxidation state of an elemen