Question: who came up with the first working periodic table?
Answer: Dmitri Mendeleev

The history of the periodic table reflects over a century of growth in the understanding of chemical properties . The most important event in its history occurred in 1869 , when the table was published by Dmitri Mendeleev , who built upon earlier discoveries by scientists such as Antoine - Laurent de Lavoisier and John Newlands , but who is nevertheless generally given sole credit for its development .