Mendeleev Is Given the Most Credit for the Concept of a Periodic

Multiple Choice

Mendeleev is given the most credit for the concept of a periodic table of the elements because:

A) He had the longest history of research in elemental properties.
B) He emphasized its usefulness in predicting the existence and properties of unknown elements.
C) His representation of the table was the most understandable.
D) His periodic table was arranged in octaves.
E) He grouped elements into triads of similar properties.