alleryWhich property of elements did Dobereiner relate their chemical behaviour to when forming triads?
AAtomic mass
BAtomic number
CNuclear charge
DValence shell
Answer & Solution
Correct answer: A. Atomic mass
1. In 1817 Dobereiner studied patterns among the known elements.
2. He proposed that the properties of elements are related to their atomic masses.
3. Atomic number and nuclear charge were not yet known concepts in 1817, ruling them out.
4. Hence the basis of his triads was atomic mass.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.25_
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