Question: Who was the first chemist that tried to group elements based on their properties?
Answer: Johann Wolfgang Döbereiner
Disambiguated annotations:
qaPairs: question: Who was the first chemist to start grouping elements based on their properties?
answer: Johann Wolfgang Döbereiner
question: Who was the first chemist to start grouping elements by properties in a periodic table?
answer: Dmitri Mendeleev