In the year 1829, John Wolfgang Dobereiner, a German Scientist noted that physical and chemical properties of several sets of three elements, arranged in the increased order of their atomic weights called “triads”

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True

False

answer is A.

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Detailed Solution

In the year 1829, John Wolfgang Dobereiner, a German Scientist noted that physical and chemical properties of several sets of three elements, arranged in the increased order of their atomic weights called “triads”. So the given statement is true.

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