<P> In 1817 , Johann Wolfgang Döbereiner , a chemist , began to formulate one of the earliest attempts to classify the elements . In 1829 , he found that he could form some of the elements into groups of three , with the members of each group having related properties . He termed these groups triads . </P>
<P> In 1817 , Johann Wolfgang Döbereiner , a chemist , began to formulate one of the earliest attempts to classify the elements . In 1829 , he found that he could form some of the elements into groups of three , with the members of each group having related properties . He termed these groups triads . </P>
who was the first chemist that tried to group elements based on their properties
who was the first chemist that tried to group elements based on their properties
Johann Wolfgang Döbereiner
Johann Wolfgang Döbereiner