Question

What were the criteria for the classification of elements in Mendeleev's Periodic Table?

• A. atomic number
• B. mass number
• C. valence electrons
• D. number of shells

Answer 1

The correct option is B

mass number

Dmitri Mendeleev, a Russian chemist published a table of elements, which states that the properties of elements are the periodic functions of their atomic masses. He arranged the elements in the increasing order of their atomic masses and observed the relationship between atomic masses of the elements and their physical properties.