The history of the periodic table

Newlands' Octaves

• In the mid 1860's, John made progress in grouping elements. 
• He listed the 56 elements in order of atomic mass (or atomic weight as it was known then)
• He noticed a pattern-every eighth element had simlar properties so he grouped the elements
• He called his discovery the law of octaves 

Mendeleev's Masterpiece

• In 1869, Russian chemistry professor Dmitri Mendeleev made lots…