Alexander the Great’s tutor
1865
John Newlands published the book, Law of Octaves which he arranged elements from their atomic mass
*Newlands can make an argument that he was the first to arrange the first periodic table
1869
Dmitri Mendeleev arranged the first widely accepted periodic table separating the elements by their properties
1897
J.J. Thompson performed experiments indicating that cathode rays really were unique particles, rather than waves, atoms or molecules as was believed…
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