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  • What is the correct order of Calcium, Strontium, and Barium to satisfy Dobereiner’s law of triads?Option: 1 Calcium, Barium

What is the correct order of Calcium, Strontium, and Barium to satisfy Dobereiner’s law of triads?

Option: 1

Calcium, Barium and Strontium


Option: 2

Calcium, Strontium and Barium


Option: 3

Strontium, Barium and Calcium


Option: 4

Barium, Strontium and Calcium


Answers (1)

best_answer

DOBEREINER TRIAD RULE

J.W. Dorbereiner pointed out that within a group of three elements having similar chemical and physical properties, the atomic weight of the middle element is the mean of the other two. Some examples of such triads are given below. He also pointed out the triad - iron, cobalt, and nickel in which the atomic weights of the elements are almost the same.

Ca - 40 amu

Sr - 88 amu

Ba - 137 amu

\frac{40+137}{2}=\frac{177}{2}=88.5

Therefore, Option(2) is correct

Posted by

Ritika Harsh

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