Question

What was the key characteristic by which Dmitri Mendeleev arranged his periodic table? A. increasing atomic number B. electron configuration C. decreasing atomic number D. increasing atomic mass

Answer 1

I think the correct answer from the choices listed above is option A. The key characteristic by which Dmitri Mendeleev arranged his periodic table was that the elements are arranged in increasing atomic number. Hope this answers the question.

Answer 2

Answer: D. increasing atomic mass

Explanation: Dmitri Mendeleev arranged the periodic table on the basis of the increasing atomic mass.

He observed the physical and chemical properties of the elements and he found that these properties are related to their atomic masses. Thus he arranged these elements on the basis of the physical and chemical properties into different kinds of groups.

Thus elements with similar property was arranged in the same group.