Question

Which of the following characteristics was not included in Dmitri Mendeleev's periodic table?

A. elements arranged by increasing atomic mass

B. elements placed in columns based on chemical properties

C. distribution of elements determined by electron configuration

D. heavier elements placed in rows closer to the bottom of the table

D is what i choose but i want to make sure i am right

Answer 1

I would choose C

Answer 2

thank you