In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?

Q. In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the Periodic Table later?

A.            Chlorine

B.            Silicon

C.            Oxygen

D.            Germanium

Answer: Germanium

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