first table of chemical substances?
What principles John Dalton suggested?
What
language Jöns Jacob Berzelius based the names of the elements?What sir Humphrey Davy created?
What Gustav Robert Kirchhoff discovered?
What Johann Döbereiner the first to recognize?
How John Newlands arranged all the elements?
What Julius Lothar Meyer established?
When Dmitry Mendeleev was appointed Professor of General chemistry?