Question

In the Doberiener's triad, all three elements have similar:

• A. electronic configuration
• B. properties
• C. number of shells
• D. both A and B

Answer 1

Answer: (B)

properties

In the Doberiener's triad, all three elements have similar properties and the atomic weight of the middle member of each triad is very close to the arithmetic mean (average) of the other two elements.

The Dobereiner's triads include (1) Li, Na, K (2) Ca, Sr, Ba and (3) Cl, Br, I.

Hence, the correct option is $\text{B}$