Question

Dobereiner suggested that properties of elements are related to their _______.

• A. atomic numbers
• B. atomic masses
• C. number of electrons
• D. atomic sizes

Answer 1

The correct option is B atomic masses

Dobereiner arranged the then known elements with similar properties into groups. Each group had three elements. The elements were arranged in increasing order of their atomic masses in a way that the mass of the middle element was equal to the average of the atomic masses of first and third element. He named these groups as triads.