In 1862, a year before John Alexander Reina Newlands published his classification of the elements, de Chancourtois created a fully functioning and unique system of organizing the chemical elements.
Newlands' "octaves" (1865) were harshly criticized for separating iron from cobalt and nickel.
Continuing Johann Wolfgang Döbereiner’s work with triads and Jean-Baptiste Dumas' families of similar elements, he published in 1865 his 'Law of octaves', which stated that "any given element will exhibit analogues behaviour to the eighth element following it in the table."
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In 1865, the English chemist John Newlands classified the fifty-six known elements into eleven groups, based on their physical properties.