Question

How did the work of Dmitri Mendeleev differ from that of John Newlands in the development of the periodic table?

A. Mendeleev arranged the elements according to increasing atomic mass.
B. Mendeleev predicted elements that would later be discovered.
C. Mendeleev identified elements that had similar properties.
D. Mendeleev organized elements into triads based on their properties.

Answer 1

took the quiz, it's B.

Answer 2

B.

Both recognized that the elements have repeating properties but Mendeleev realized that there are elements yet to be discovered while Newlands tried to fit the known elements together.