JEE Main Chemistry question

The discovery of which of the following group of elements gave death blow to the Newland's law of octaves? [Manipal 2008]

(A)Inert gasesCorrect
(B)Alkaline earths
(C)Rare earths
(D)Actinides

Answer: (A)

Solution

Newlands' Law of Octaves stated that every eighth element (when arranged in order of increasing atomic mass) resembles the first. The discovery of the noble (inert) gases added a whole new group between halogens and alkali metals, destroying the strict "every eighth element" periodicity

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Question ID VK-133076