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Question

Name the scientists who gave the following laws in the early classification of elements:
(a) Law of octaves (b) Law of triads

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Solution

(a) John Newlands put forward his law of octaves in 1864 in which he arranged all the elements known at the time into a table in order of relative atomic mass.
(b) Dobereiner made groups of three elements each, having similar chemical properties and called them triads.

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