Which of the following scientists grouped the elements into triads?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Johann Wolfgang Dobereiner.
The scientist who grouped elements into triads was Johann Wolfgang Döbereiner. In the early 19th century, Döbereiner observed that certain elements could be grouped in sets of three, where the atomic mass of the middle element was approximately the average of the other two. This was known as the "Law of Triads." His work laid the foundation for later developments in the periodic classification of elements, although it was eventually superseded by more refined models like Mendeleev's periodic table.