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NEETChemistryClassification of Elements and Periodicity in Properties

What was the atomic weight relationship among the elements in each Triad noted by Dobereiner?

Options

  1. AThe middle element had a higher atomic weight.
  2. BThe atomic weights of all three elements were the same.
  3. CThe atomic weight of the middle element was halfway between the other two.
  4. DThe atomic weights of the other two elements were equal.

Correct answer

C. The atomic weight of the middle element was halfway between the other two.

Step-by-step solution

In each Triad, Johann Dobereiner noted that the atomic weight of the middle element was about halfway between the atomic weights of the other two.

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