_____ was responsible for first grouping elements into triads based on similar properties.
A. Döbereiner
B. Moseley
C. Dalton
D. Mendeleev
1 answer
http://en.wikipedia.org/wiki/D%C3%B6bereiner%27s_triads
A. Döbereiner
B. Moseley
C. Dalton
D. Mendeleev
1 answer