Question

The elements in the Dobereiner’s triads follow:

• A. The elements are written in increasing order of atomic mass.
• B. The mass of middle element was roughly the average of atomic masses of other two elements.
• C. Elements in the Triads show similar properties.
• D. All the options are correct

Answer 1

The correct option is D

All the options are correct

Dobereiner stated that when elements with similar properties are arranged in groups in the increasing order of their atomic mass, the atomic mass of the middle element is roughly the average of the atomic masses of the adjacent two elements. Dobereiner arranged them in triads. Hence, all the statements given in the options are true.