Class 10

Periodic Classification of Elements question bank (Science)

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Q1.

Did Dobereiner's triads also exist in the columns of Newlands' Octaves? Compare and find out.

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Q2.

Which one of the following depicts the correct representation of atomic radius $(r)$ of an atom?

figure

(A)
$(i)$ and $(ii)$
(B)
$(iii)$ and $(iv)$
(C)
$(ii)$ and $(iii)$
(D)
$(i)$ and $(iv)$
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