Which of the following sets of elements does NOT strictly represent a Dobereiner's triad? — Periodic Table and Periodicity Chemistry Question
Question
Which of the following sets of elements does NOT strictly represent a Dobereiner's triad?
Answer: B
💡 Solution & Explanation
According to Dobereiner's law of triads, the atomic mass of the middle element is roughly the average of the other two. Ca, Sr, Ba form a triad, whereas Mg, Ca, Sr do not properly fit the mathematical average rule.
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