Mendeleev arranged his periodic table by order of increasing:
A)elemental volume.
B)proton count.
C)elemental mass.
D)elemental size.

Question

Quizplus · Accepted Answer

Mendeleev arranged the elements in his periodic table in order of increasing atomic mass, which is closely related to the number of protons and neutrons in an atom's nucleus. This organization allowed him to predict the properties of elements that had not yet been discovered.

Mendeleev Arranged His Periodic Table by Order of Increasing