BIGBOS777 LINK SLOT NO FURTHER A MYSTERY

In Mendeleev's 1871 periodic desk, copper, silver, and gold are stated twice, at the time beneath group VIII (Using the iron triad and platinum team metals), and the moment underneath group IB. Group IB was Nevertheless parenthesised to note that it was tentative. Mendeleev's major criterion for group assignment was the utmost oxidation point out o