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Chemistry
Which fact is not valid for Dobereiner's triads?
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Q. Which fact is not valid for Dobereiner's triads?
Classification of Elements and Periodicity in Properties
A
The atomic weight of middle element is roughly average of the other two elements
11%
B
The properties of middle element is roughly average of the other two elements
32%
C
The elements of triads belong to the same group of modern periodic table
22%
D
The elements of triads have same valency electron
35%
Solution:
Correct answer is (b) The properties of middle element is roughly average of the other two elements