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 of these

Answer 1

The correct option is D

All of these

By observing the triads, you can see that they follow all the below mentioned rules.

(i) The elements are written in increasing order of atomic mass

(ii)The mass of middle element was roughly the average of atomic masses of other two elements

(iii) Elements in the Triads show similar properties.