
Model of the periodic system of de Chancourtois
1925; 1862
1925; 1862
1917
1993
1948-03-21
2016
1928
1977
1991
1991
1991
1991
1200-1500 (original)
1925
1925
1911
1925
1925
1925
1932
1932
1917
1970-1975
1970-1975
1972
1972
1897-1898
1850-1900
1895
1957
1884-1885; 1919
1965
1903
1964
1964
1965
1949-05-05
1948-03-21
1948-03-21
1996
1862-1877; 1965; 1965
1925
1925
1919
circa 1588
1937
1931; 750-850 CE
1960-1979
1950
1931
1690